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

It is currently 17 Apr 2014, 10:32

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

M21 Ques36 Doubt

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Intern
Intern
Joined: 12 Nov 2009
Posts: 46
Followers: 0

Kudos [?]: 1 [0], given: 2

M21 Ques36 Doubt [#permalink] New post 30 Nov 2009, 18:48
A basket contains cards bearing numbers 10, 11,... , 20. If a card is drawn from the basket and is not returned to it, and then the second card is drawn from the basket, what is the probability that the first card drawn will have a prime number on it while the second will not?

This is my approach:
Prob of prime number = 4/11
Prob of no prime on second card = 6/10

Total probability = 4/11 * 6/10 = 12/55

Please let me know if I am wrong. The answer choices are:
28/110
4/15
5/16
27/80
32/55
Intern
Intern
Joined: 12 Nov 2009
Posts: 46
Followers: 0

Kudos [?]: 1 [0], given: 2

Re: M21 Ques36 Doubt [#permalink] New post 30 Nov 2009, 22:59
My apologies...I overlooked the number of non-primes...so the answer makes sense.
Re: M21 Ques36 Doubt   [#permalink] 30 Nov 2009, 22:59
    Similar topics Author Replies Last post
Similar
Topics:
Popular new posts 26 M21 #28 arjtryarjtry 24 23 Aug 2008, 22:50
Popular new posts 9 Experts publish their posts in the topic M21#15 ventivish 16 23 Nov 2008, 11:43
Popular new posts 13 Experts publish their posts in the topic M21#29 ventivish 22 23 Nov 2008, 12:43
Popular new posts 34 Experts publish their posts in the topic m21 #20 dczuchta 24 27 Feb 2009, 10:40
Popular new posts 17 m21 #8 dakhan 21 01 Jun 2009, 18:41
Display posts from previous: Sort by

M21 Ques36 Doubt

  Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: Bunuel, WoundedTiger



cron

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®.