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

It is currently 20 Aug 2014, 01:11

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

Time yourself 2. Work this problem on paper as fast as you

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
CEO
CEO
avatar
Joined: 15 Aug 2003
Posts: 3470
Followers: 59

Kudos [?]: 665 [0], given: 781

Time yourself 2. Work this problem on paper as fast as you [#permalink] New post 07 Mar 2004, 22:56
1. Time yourself
2. Work this problem on paper as fast as you can ( doing this under 2 mins is our goal)
3. Type your solution here and your time, if possible:)

Go!

Two events A & B are such that P(A) = 0.83, P(B) = 0.25. If C is a set of possible values of probability that A & B both occur, Find the range of C?
Intern
Intern
avatar
Joined: 12 Jan 2004
Posts: 26
Location: Israel
Followers: 0

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

My answer [#permalink] New post 08 Mar 2004, 02:57
Am I missing something or is the answer X*Y = 0.2075 (30sec.)?
Director
Director
avatar
Joined: 03 Jul 2003
Posts: 656
Followers: 2

Kudos [?]: 13 [0], given: 0

GMAT Tests User
 [#permalink] New post 08 Mar 2004, 05:19
P(C) = 0.2075
(Time less than a minute)
Senior Manager
Senior Manager
avatar
Joined: 23 Sep 2003
Posts: 295
Location: US
Followers: 1

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

GMAT Tests User
 [#permalink] New post 08 Mar 2004, 05:50
That's a bad question. I don't see how there could be a range. There's only one possible answer and that is 0.207 which is not a range.
SVP
SVP
User avatar
Joined: 30 Oct 2003
Posts: 1798
Location: NewJersey USA
Followers: 3

Kudos [?]: 31 [0], given: 0

GMAT Tests User
 [#permalink] New post 08 Mar 2004, 06:10
If these two events are mutually exclusive then P(A&B) = 0
if these are independent events and not mutually exclusive
P(A&B) = P(A) & P(B) = 0.2075

If they are dependent events
P(A or B) = P(A) + P(B) - P(A&B)
Max of P(A OR B) = 1
P(A&B) = 0.83+0.25 - 1 = 0.08

Range is 0.08 to 0.2075
or the range is
0 to 0.2075
CEO
CEO
avatar
Joined: 15 Aug 2003
Posts: 3470
Followers: 59

Kudos [?]: 665 [0], given: 781

 [#permalink] New post 08 Mar 2004, 08:30
ndidi204 wrote:
That's a bad question. I don't see how there could be a range. There's only one possible answer and that is 0.207 which is not a range.


nope, i hope to prove that none of you is right.

Range = Maximum - Minimum
1. what is the Maximum possible value of C?
2. what is the Minimum possible value of C?
SVP
SVP
User avatar
Joined: 30 Oct 2003
Posts: 1798
Location: NewJersey USA
Followers: 3

Kudos [?]: 31 [0], given: 0

GMAT Tests User
 [#permalink] New post 08 Mar 2004, 08:44
Hi Praetorian,

Would you mind explaining the solution. Already enough people have pounded on this.

Anand.
CEO
CEO
avatar
Joined: 15 Aug 2003
Posts: 3470
Followers: 59

Kudos [?]: 665 [0], given: 781

 [#permalink] New post 08 Mar 2004, 08:55
anandnk wrote:
Hi Praetorian,

Would you mind explaining the solution. Already enough people have pounded on this.

Anand.


Sure.

1. The events A and B cannot be mutually exclusive.
P(A) + P(B) > 1
so, the minimum value of C cannot be 0.
the minimum C is 0.83 + 0.25 - 1 = 0.08

2. About the maximum, that will occur when B is a subset of A.
that is C = 0.25


you answer then is Range = 0.25 -0.08 =0.17 :)

questions?
SVP
SVP
User avatar
Joined: 30 Oct 2003
Posts: 1798
Location: NewJersey USA
Followers: 3

Kudos [?]: 31 [0], given: 0

GMAT Tests User
 [#permalink] New post 08 Mar 2004, 10:22
Hmm,

I was atleast half right. Never thought of this scenario where B could be part of A.

Thanks,
Anand.
CEO
CEO
avatar
Joined: 15 Aug 2003
Posts: 3470
Followers: 59

Kudos [?]: 665 [0], given: 781

 [#permalink] New post 08 Mar 2004, 10:55
anandnk wrote:
Hmm,

I was atleast half right. Never thought of this scenario where B could be part of A.

Thanks,
Anand.


I will give y'all answer choices next time.
  [#permalink] 08 Mar 2004, 10:55
    Similar topics Author Replies Last post
Similar
Topics:
Time and work problems mahasane 3 25 Jul 2010, 06:29
1 Time & Work problem maheshkrishna 3 17 Jun 2008, 01:18
Time yourself.. under 2 mins haas_mba07 9 27 Aug 2006, 17:16
How do you work a problem like: (x-2)^2=36 Can you take the nothanks 2 11 Aug 2006, 09:13
Remember to time yourself for < 2 mins hardworker_indian 2 19 Sep 2004, 19:20
Display posts from previous: Sort by

Time yourself 2. Work this problem on paper as fast as you

  Question banks Downloads My Bookmarks Reviews Important topics  


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®.