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

It is currently 29 Jul 2014, 03:11

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

What is the probability of getting two cards belonging to

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
avatar
Joined: 13 Aug 2005
Posts: 26
Location: Israel
Followers: 0

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

What is the probability of getting two cards belonging to [#permalink] New post 28 Aug 2005, 14:14
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
What is the probability of getting two cards belonging to two different suits when two cards are drawn at random from a pack of well shuffled cards comprising 52 cards?

a. 1/13
b. 13/17
c. 13/51
d. 26/51
e. 12/51

Can you explain this one?
Thanks, Yaron
Manager
Manager
User avatar
Joined: 07 Jun 2005
Posts: 90
Followers: 1

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

 [#permalink] New post 28 Aug 2005, 16:09
hmm..i cant seem to get it. here's my working

Prob of drawing one card of a suit = 13/52 = 1/4
Prob of drawing second card of one of the 3 OTHER suits = 13*3/51(51 since one card has already been drawn). = 13/17

So i get (1/4)*(13/17) = 13/68 which of course isnt in the answers. so where did i go wrong?
Intern
Intern
avatar
Joined: 24 Aug 2005
Posts: 8
Followers: 0

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

 [#permalink] New post 28 Aug 2005, 16:29
I think it is B:

what card we get first doesn't matter, what matters is the second one. If we count the probability of getting the second card different from the first card we get the answer:

as we already took one card the total number is 51, and we have 39 cards that are different from the one that was taken first. So, the probability of getting a card different from the first is 39/51, or 13/17
Manager
Manager
User avatar
Joined: 07 Jun 2005
Posts: 90
Followers: 1

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

 [#permalink] New post 28 Aug 2005, 17:37
ahh yes i see my mistake now. first card is actually anything since suit doesnt matter...cheers suslik!
  [#permalink] 28 Aug 2005, 17:37
    Similar topics Author Replies Last post
Similar
Topics:
What is the probability of getting two cards belonging to old_dream_1976 4 25 Jun 2006, 06:08
probability cards cloaked_vessel 2 02 Nov 2005, 19:31
What is the probability of picking a red card or a 7, if 1 chets 4 06 Oct 2005, 21:04
Probability - Cards vivek123 10 04 Aug 2005, 03:05
What is the probability of getting a King and a Queen in TWO christoph 2 06 Mar 2005, 02:26
Display posts from previous: Sort by

What is the probability of getting two cards belonging to

  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®.