GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 18 Sep 2018, 16:28

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.

Close

Request Expert Reply

Confirm Cancel

A flower arrangement consists of 30 roses, each of which is

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Joined: 30 Mar 2007
Posts: 172
A flower arrangement consists of 30 roses, each of which is  [#permalink]

Show Tags

New post 13 May 2007, 03:18
2
1
A flower arrangement consists of 30 roses, each of which is either white or red. If a rose is to be selected at random from the flower arrangement, the probability that the rose selected will be white is twice the probability that it will be red. How many white roses are in the flower arrangement?
A. 5
B. 10
C. 15
D. 20
E. 25

If the product of the 3 digits of the positive integer k is 14, what is the value of k?
(1) k is an odd integer
(2) k i know its a pretty easy answer but just want to make sure how you solve for each condition

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.


If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Intern
Intern
User avatar
Joined: 01 May 2007
Posts: 18
Schools: INSEAD, Wharton, Chicago
  [#permalink]

Show Tags

New post 13 May 2007, 04:55
Q1. 20/30 is 2 times more than 10/30. Hence, 20 white roses are in the flower arrangement. Answer is D.

Q2. Didn't get the second statement. Elaborate pls.
Manager
Manager
avatar
Joined: 15 Mar 2012
Posts: 53
Location: United States
Concentration: Marketing, Strategy
Re: A flower arrangement consists of 30 roses, each of which is  [#permalink]

Show Tags

New post 26 Mar 2013, 07:45
Probability of red: Pr = X
Probability of white: Pw = 2X
Total Roses: 30

1/x + 1/2x = 1/30, x=1/20

Hence, 20 roses are white, 10 are red.

Hope its clear.
_________________

MV
"Better to fight for something than live for nothing.” ― George S. Patton Jr

Veritas Prep GMAT Instructor
User avatar
Joined: 11 Dec 2012
Posts: 313
Re: A flower arrangement consists of 30 roses, each of which is  [#permalink]

Show Tags

New post 26 Mar 2013, 09:17
1
1
Jamesk486 wrote:
A flower arrangement consists of 30 roses, each of which is either white or red. If a rose is to be selected at random from the flower arrangement, the probability that the rose selected will be white is twice the probability that it will be red. How many white roses are in the flower arrangement?
A. 5
B. 10
C. 15
D. 20
E. 25

If the product of the 3 digits of the positive integer k is 14, what is the value of k?
(1) k is an odd integer
(2) k i know its a pretty easy answer but just want to make sure how you solve for each condition


Hi James486,

The roses is rather straight forward in that there must be twice as many white roses as red roses. This is a simple probability without any outside factors. There must be 10 red and 20 white roses as elaborated upon above. You can also set it up as two algebraic formulas:

W+R = 30
W = 2R.
Substituting we find 3R = 30, R=10, W=20. Answer choice D.


The second question is interesting as well. I read statement 2 as K 700) but leaves 127, 172, 217 and 271.
Combining them we can eliminate 3 answer choices (evens or >700) but still have 127, 217 and 271 that satisfy these conditions.

Answer is therefore E in this data sufficiency question. It could have been C had statement 2 been k>700 instead of <... but as written we cannot differentiate between 3 valid options.

Hope this helps!
-Ron

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.


If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________

Ron Awad
Veritas Prep | GMAT Instructor
Save $100 on Veritas Prep GMAT Courses and Admissions Consulting Services
Veritas Prep Reviews

Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 8064
Premium Member
Re: A flower arrangement consists of 30 roses, each of which is  [#permalink]

Show Tags

New post 28 Jun 2018, 02:00
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Re: A flower arrangement consists of 30 roses, each of which is &nbs [#permalink] 28 Jun 2018, 02:00
Display posts from previous: Sort by

A flower arrangement consists of 30 roses, each of which is

  post reply Question banks Downloads My Bookmarks Reviews Important topics  

Moderator: chetan2u

Events & Promotions

PREV
NEXT


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

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.