Find all School-related info fast with the new School-Specific MBA Forum

It is currently 20 Oct 2014, 16:36

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If the probability of rain on any given day is 50%, what is

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
avatar
Joined: 16 Apr 2009
Posts: 341
Followers: 1

Kudos [?]: 52 [0], given: 14

If the probability of rain on any given day is 50%, what is [#permalink] New post 21 Aug 2010, 16:04
2
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  95% (hard)

Question Stats:

31% (03:15) correct 69% (00:59) wrong based on 164 sessions
If the probability of rain on any given day is 50%, what is the probability that it will rain on at least 3 days in a row during a 5 day period?

(A) 3/32
(B) 1/4
(C) 9/32
(D) 5/16
(E) 1/2
[Reveal] Spoiler: OA

_________________

Always tag your question

Senior Manager
Senior Manager
User avatar
Status: Time to step up the tempo
Joined: 24 Jun 2010
Posts: 410
Location: Milky way
Schools: ISB, Tepper - CMU, Chicago Booth, LSB
Followers: 7

Kudos [?]: 119 [0], given: 50

Re: Rain at least 3 days [#permalink] New post 21 Aug 2010, 16:19
ichha148 wrote:
If the probability of rain on any given day is 50%, what is the probability that it
will rain on at least 3 days in a row during a 5 day period?
(A) 3/32

(B) 1/4

(C) 9/32

(D)5/16

(E) 1/2

Please explain . OA to be shared later


My attempt:

Rainy days - R, Non-Rainy days - NR.

Prob of at least 3 rainy days - 1 - (Prob of zero + Prob of 1 + Prob of 2 rainy days)

Prob of zero rainy days - NNNNN - 1/(2^5)

Prob of 1 rainy day - NNNNR - 1/(2^5). But the one rainy day could be either first, second of third...

Hence total combination - 5C1. Prob of 1 rainy day - 5 * 1/(2^5)

Prob of 2 rainy day - NNNRR - 1/(2^5). But the one rainy day could be either first & second or third & fourth...

Hence total combination - 5C2. Prob of 1 rainy day - 10 * 1/(2^5)

Hence total prob = 1 - ((1/32) + (5/32) + (10/32))

1- (16/32)

= 1/2. Answer should be 1/2 (E).
_________________

:good Support GMAT Club by putting a GMAT Club badge on your blog :thanks

Senior Manager
Senior Manager
avatar
Joined: 16 Apr 2009
Posts: 341
Followers: 1

Kudos [?]: 52 [0], given: 14

Re: Rain at least 3 days [#permalink] New post 21 Aug 2010, 17:54
i also got the same answer , this is not the correct answer
_________________

Always tag your question

Expert Post
4 KUDOS received
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 23348
Followers: 3601

Kudos [?]: 28653 [4] , given: 2808

Re: Rain at least 3 days [#permalink] New post 21 Aug 2010, 19:33
4
This post received
KUDOS
Expert's post
1
This post was
BOOKMARKED
ichha148 wrote:
If the probability of rain on any given day is 50%, what is the probability that it
will rain on at least 3 days in a row during a 5 day period?
(A) 3/32

(B) 1/4

(C) 9/32

(D)5/16

(E) 1/2

Please explain . OA to be shared later


It's basically the same as this one: hard-probability-99478.html?hilit=heads#p766970

At least 3 days in a row during a 5 day period means that 3, 4 or 5 days in a row:

3 days in a row
5 cases:
RRRNN
NRRRN
NNRRR
RNRRR
RRRNR

P=5*(\frac{1}{2})^5=\frac{5}{32}.

4 days in a row
2 cases:
RRRRN
NRRRR

P=2*(\frac{1}{2})^5=\frac{2}{32}.

5 days in a row
1 case:
RRRRR

P=(\frac{1}{2})^5=\frac{1}{32}.

P=\frac{5}{32}+\frac{2}{32}+\frac{1}{32}=\frac{8}{32}=\frac{1}{4}.

Answer: B.
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
25 extra-hard Quant Tests

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Senior Manager
Senior Manager
User avatar
Status: Time to step up the tempo
Joined: 24 Jun 2010
Posts: 410
Location: Milky way
Schools: ISB, Tepper - CMU, Chicago Booth, LSB
Followers: 7

Kudos [?]: 119 [0], given: 50

Re: Rain at least 3 days [#permalink] New post 21 Aug 2010, 19:45
Thanks Bunuel.

I missed to capture the crucial wording of the question.... :(

what is the probability that it will rain on at least 3 days [highlight]in a row[/highlight] during a 5 day period
_________________

:good Support GMAT Club by putting a GMAT Club badge on your blog :thanks

Senior Manager
Senior Manager
avatar
Joined: 16 Apr 2009
Posts: 341
Followers: 1

Kudos [?]: 52 [0], given: 14

Re: Rain at least 3 days [#permalink] New post 22 Aug 2010, 08:23
damn! i also missed the same part :cry:
_________________

Always tag your question

Intern
Intern
avatar
Joined: 27 Apr 2011
Posts: 5
Followers: 0

Kudos [?]: 0 [0], given: 0

Veritas Combinatorics and Probability Question #12 [#permalink] New post 27 Apr 2011, 18:16
I am reviewing the Veritas Combinatorics and Probability book right now and have a question on question 12 (pg 54). It asks: If the probability of rain on any given day is 50%, what is the probability that it will rain on at least 3 days in a row during a 5 day period?

I understand the explanation given in the book. The method is a little tedious--it solves the problem by drawing out all the possibilities and then adding them together. Anyone know how to solve this by pure math/combinatorics instead of writing out all the possibilities?

Thanks!
Director
Director
avatar
Status: Matriculating
Affiliations: Chicago Booth Class of 2015
Joined: 03 Feb 2011
Posts: 931
Followers: 11

Kudos [?]: 198 [0], given: 123

Reviews Badge
Re: Veritas Combinatorics and Probability Question #12 [#permalink] New post 27 Apr 2011, 18:25
Its like throwing a coin since the odds are equal. P(raining) = 0.5 and P(not raining) = 0.5 on any day

I think we can use the binomial distribution here. total probability = sum of probabilities (3 days rain + 4 days rain + 5 days rain)

P(3 days) = 5C3 (0.5)^3 (0.5)^2
P(4 days) = 5C4 (0.5)^4 (0.5)^1
P(5 days) = 5C5 (0.5)^5 (0.5)^0

P(atleast 3 days) = sum of above.

Conversely you can use the 1- x rule. P(at least 3 days ) = 1- P(atmost 2 days)

gmatstudier wrote:
I am reviewing the Veritas Combinatorics and Probability book right now and have a question on question 12 (pg 54). It asks: If the probability of rain on any given day is 50%, what is the probability that it will rain on at least 3 days in a row during a 5 day period?

I understand the explanation given in the book. The method is a little tedious--it solves the problem by drawing out all the possibilities and then adding them together. Anyone know how to solve this by pure math/combinatorics instead of writing out all the possibilities?

Thanks!
Intern
Intern
avatar
Joined: 27 Apr 2011
Posts: 5
Followers: 0

Kudos [?]: 0 [0], given: 0

Re: Veritas Combinatorics and Probability Question #12 [#permalink] New post 27 Apr 2011, 18:45
Yeah that's what I thought, but the answer is .25. I tried adding your equation up and it didn't match. Am I doing somehting wrong?
Director
Director
avatar
Status: Matriculating
Affiliations: Chicago Booth Class of 2015
Joined: 03 Feb 2011
Posts: 931
Followers: 11

Kudos [?]: 198 [0], given: 123

Reviews Badge
Re: Veritas Combinatorics and Probability Question #12 [#permalink] New post 27 Apr 2011, 19:34
I find concurrence here. See Testluv approach -
http://www.beatthegmat.com/probability- ... 49765.html

Quote:
student22 wrote:
Thanks valleeny for clarifying.

I just came across a similar problem where instead of EXACTLY 3 out of 5 days rain
it says AT LEAST 3 out of 5 days rain. So you would have to calculate the chance of rain occurring on 3, 4, and 5 days:

You would do (5C3 + 5C4 + 5C5) / 2^5

16/32 = 1/2

Testluv, for the pascal's triangle in this situation you would go to the last row and add everything to the right of the 3rd digit 10 (Digit 4, 5, and 6)? so 10 + 5 + 1 = 16/32?
Yes, that's correct. (Alernatively, you can go to the last row, and add everything to the left of the fourth digit: 1 + 5 + 10 = 16.)

EDIT: Here's how we work with the last row. If asked for probability of 0 rainy days (or 0 heads, etc), then we look at either the "1" that begins the row or the "1" that ends the row. If we want to 1 rainy day, then we look at either of the "5"s. If we want 2 or 3 rainy days, then we look at either of the "10"s. If we want "at least" then we just sum up in the manner you intuited.

When a probability problem says "at least" it is almost always easier to think about the undesirable events, and then subtract from 1. So, using the formula, it would be easier to say: 1 - (5C0 + 5C1 + 5C2)/2^5 = 1/2. Here, it doesn't make a big difference but if the problem had said "at least 2 days of rain", it would be far quicker to compute 5C0 + 5C1, than it would be to compute 5C2 + 5C3 + 5C4 + 5C5.

Know that nCn = nC0 = 1. Also, nC1 = n. Knowing this greatly speeds up usage of the formula.


gmatstudier wrote:
Yeah that's what I thought, but the answer is .25. I tried adding your equation up and it didn't match. Am I doing somehting wrong?
GMAT Instructor
avatar
Joined: 24 Jun 2008
Posts: 978
Location: Toronto
Followers: 262

Kudos [?]: 704 [0], given: 3

Re: Veritas Combinatorics and Probability Question #12 [#permalink] New post 27 Apr 2011, 19:40
It's not asking for the probability that it rains on any 3 (or more) days; it's asking for the probability it rains on (at least) 3 days *in a row*. That's going to be less likely than it just raining on 3 days, because we don't want to count some sequences, like Rain, Sun, Rain, Sun, Rain, where we don't have 3 rainy days in a row.

There are a lot of ways to count the sequences which have 3 Rs in a row. Let's think of a sequence of rainy and sunny days as a word containing R's and S's. We can count as follows:

* if our word starts with RRR, we'd have 2 choices for the fourth and fifth days, so 2*2 = 4 sequences which begin with three rainy days

* if our word starts with SRRR, we have 2 choices for the final day, for 2 sequences we haven't yet counted with three rainy days in the middle (we have already counted the possibilities where the first day is an R)

* if our word ends in RRR, we have 2 final possibilities we have not yet counted: RSRRR and SSRRR (we have counted the possibilities with three Rs in the middle, so we need to make sure only to count those possibilities where the second day is an S)

so, adding, there are a total of 8 sequences with at least three consecutive Rs, and since there are 2^5 = 32 total sequences, the probability of having at least three consecutive rainy days is 8/32 = 1/4.
_________________

Nov 2011: After years of development, I am now making my advanced Quant books and high-level problem sets available for sale. Contact me at ianstewartgmat at gmail.com for details.

Private GMAT Tutor based in Toronto

Director
Director
avatar
Status: Matriculating
Affiliations: Chicago Booth Class of 2015
Joined: 03 Feb 2011
Posts: 931
Followers: 11

Kudos [?]: 198 [0], given: 123

Reviews Badge
Re: Veritas Combinatorics and Probability Question #12 [#permalink] New post 27 Apr 2011, 20:01
wow Ian !! Thanks .... I didnt read "in a row"

3 consecutive rainy days -
SRRRS
SSRRR
RRRSS
RSRRR
RRRSR

4 consecutive rainy days -
RRRRS
SRRRR

5 consecutive rainy days -
RRRRR

Total ways = 8

P(atleast 3 consecutive days) = 8/2^5 = 8/32 = 0.25
Intern
Intern
avatar
Joined: 05 Oct 2012
Posts: 11
Followers: 0

Kudos [?]: 0 [0], given: 37

tough probability question from veritas [#permalink] New post 04 Oct 2013, 19:53
ıf the probability of rain on any given day is 50%, what is the probability that it will rain on at least 3 days ina row during a 5 days period?
a) 3/32 b) 1/4 c) 9/32 d) 5/16 e) 1/2

Bunuel please help me with this question.
Because I have not understand the answer.
Intern
Intern
avatar
Status: NOT READY TO GIVE UP
Joined: 24 Apr 2013
Posts: 22
Location: India
Concentration: Strategy, Marketing
GMAT Date: 10-30-2013
WE: Engineering (Other)
Followers: 0

Kudos [?]: 1 [0], given: 44

CAT Tests
Re: tough probability question from veritas [#permalink] New post 04 Oct 2013, 20:32
eeakkan wrote:
ıf the probability of rain on any given day is 50%, what is the probability that it will rain on at least 3 days ina row during a 5 days period?
a) 3/32 b) 1/4 c) 9/32 d) 5/16 e) 1/2

Bunuel please help me with this question.
Because I have not understand the answer.



See.. the Possibility of Rain on any given day=1/2

Now lets take the 5 day period...

Now we want to make it rain for 3 continuous days so : 1.1.1.1/2.1/2 for rain can happen or not for last 2 days of the week
Manager
Manager
User avatar
Joined: 23 Jan 2013
Posts: 147
Followers: 0

Kudos [?]: 12 [0], given: 22

Re: tough probability question from veritas [#permalink] New post 04 Oct 2013, 21:14
i answered A , but realized did wrong interceprion's subtraction

what we need is (1/2*1/2*1/2)+(1/2*1/2*1/2)+(1/2*1/2*1/2) = 3/8, but we should subtract (1/2*1/2*1/2*1/2) as 4 days interception, so 3/8-1/16=5/16
Intern
Intern
avatar
Joined: 28 Jan 2013
Posts: 34
Followers: 0

Kudos [?]: 15 [0], given: 20

Re: tough probability question from veritas [#permalink] New post 04 Oct 2013, 21:48
Name the days as 1, 2, 3, 4 and 5.
Given, probability of rain on any given day = 1/2 so probability of no rain on any day is also 1/2.

the question is finding probability for atleast 3 days rain.

we have 3 cases,

i) Exactly 3 days raining, that means days having rain are either 1,2,3 or 2,3,4 or 3,4,5. (Since 3 days in a row)

so probability = 3 * (1/2)^5

ii) Exactly 4 days raining, which means days having rain are 1,2,3,4 or 1,2,3,5 or 2,3,4,5 or 1,3,4,5

probability - 4* (1/2)^5

iii) Exactly 5 days raining, all 5 days raining

so prob. = (1/2)^5

Add all and we will get probability = 1/4. hence b.
Expert Post
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 23348
Followers: 3601

Kudos [?]: 28653 [0], given: 2808

Re: tough probability question from veritas [#permalink] New post 05 Oct 2013, 04:33
Expert's post
eeakkan wrote:
ıf the probability of rain on any given day is 50%, what is the probability that it will rain on at least 3 days ina row during a 5 days period?
a) 3/32 b) 1/4 c) 9/32 d) 5/16 e) 1/2

Bunuel please help me with this question.
Because I have not understand the answer.


Merging similar topics. Please refer to the solutions above.
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
25 extra-hard Quant Tests

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Intern
Intern
avatar
Joined: 15 Sep 2013
Posts: 11
Followers: 0

Kudos [?]: 1 [0], given: 16

Re: Rain at least 3 days [#permalink] New post 08 Oct 2013, 05:43
Bunuel wrote:
ichha148 wrote:
If the probability of rain on any given day is 50%, what is the probability that it
will rain on at least 3 days in a row during a 5 day period?
(A) 3/32

(B) 1/4

(C) 9/32

(D)5/16

(E) 1/2

Please explain . OA to be shared later


It's basically the same as this one: hard-probability-99478.html?hilit=heads#p766970

At least 3 days in a row during a 5 day period means that 3, 4 or 5 days in a row:

3 days in a row
5 cases:
RRRNN
NRRRN
NNRRR
RNRRR
RRRNR

P=5*(\frac{1}{2})^5=\frac{5}{32}.

4 days in a row
2 cases:
RRRRN
NRRRR

P=2*(\frac{1}{2})^5=\frac{2}{32}.

5 days in a row
1 case:
RRRRR

P=(\frac{1}{2})^5=\frac{1}{32}.

P=\frac{5}{32}+\frac{2}{32}+\frac{1}{32}=\frac{8}{32}=\frac{1}{4}.

Answer: B.


Hi Bunuel,

Why did you add up the probabilities of the 3 scenarios vs. get the product of the 3 (5/16)?
Expert Post
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 23348
Followers: 3601

Kudos [?]: 28653 [0], given: 2808

Re: Rain at least 3 days [#permalink] New post 08 Oct 2013, 05:49
Expert's post
pauc wrote:
Bunuel wrote:
ichha148 wrote:
If the probability of rain on any given day is 50%, what is the probability that it
will rain on at least 3 days in a row during a 5 day period?
(A) 3/32

(B) 1/4

(C) 9/32

(D)5/16

(E) 1/2

Please explain . OA to be shared later


It's basically the same as this one: hard-probability-99478.html?hilit=heads#p766970

At least 3 days in a row during a 5 day period means that 3, 4 or 5 days in a row:

3 days in a row
5 cases:
RRRNN
NRRRN
NNRRR
RNRRR
RRRNR

P=5*(\frac{1}{2})^5=\frac{5}{32}.

4 days in a row
2 cases:
RRRRN
NRRRR

P=2*(\frac{1}{2})^5=\frac{2}{32}.

5 days in a row
1 case:
RRRRR

P=(\frac{1}{2})^5=\frac{1}{32}.

P=\frac{5}{32}+\frac{2}{32}+\frac{1}{32}=\frac{8}{32}=\frac{1}{4}.

Answer: B.


Hi Bunuel,

Why did you add up the probabilities of the 3 scenarios vs. get the product of the 3 (5/16)?


Let me ask you a question: the probability of heads is 1/2, the probability of tails is also 1/2. What is the probability of getting a head OR a tail when flipping once? Is it 1/2+1/2=1 or 1/2*1/2=1/4?
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
25 extra-hard Quant Tests

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Intern
Intern
avatar
Joined: 15 Sep 2013
Posts: 11
Followers: 0

Kudos [?]: 1 [0], given: 16

Re: Rain at least 3 days [#permalink] New post 08 Oct 2013, 06:33
Bunuel wrote:
Let me ask you a question: the probability of heads is 1/2, the probability of tails is also 1/2. What is the probability of getting a head OR a tail when flipping once? Is it 1/2+1/2=1 or 1/2*1/2=1/4?


Won't it be just 1/2? :)
But I get what you mean when the probability problem is an OR/AND problem. I just get confused sometimes as to which of the 2 it is, especially if the problem doesn't explicitly state if it's an OR or an AND problem.
Re: Rain at least 3 days   [#permalink] 08 Oct 2013, 06:33
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic If the probability of rain on any given day in city x is 50% Alchemist1320 4 12 Jul 2011, 01:23
If the probability of rain on any given day in City X is 50 Vlad77 7 06 Aug 2007, 09:17
The probability of rain in City X is 50% on any given day. gk3.14 6 20 Aug 2006, 12:05
If the probability of rain on any given day in CityX is 50%, pesquadero 3 01 Jun 2006, 19:19
If the probability of rain on any given day in City X is 50 tbetten 6 22 Jun 2005, 15:58
Display posts from previous: Sort by

If the probability of rain on any given day is 50%, what is

  Question banks Downloads My Bookmarks Reviews Important topics  

Go to page    1   2    Next  [ 21 posts ] 



GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.