BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Drinking problem!!

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Legendary Member
Posts: 621
Joined: Wed Apr 09, 2008 7:13 pm
Thanked: 33 times
Followed by:4 members

Drinking problem!!

by vittalgmat » Wed Dec 31, 2008 7:58 pm
Wishing every one a happy new year 2009. While drinking alchohol, here is an easy problem to solve...

A store buys 10 bottles of alcohol, including 7 bottles of whiskeys. In the evening, 6 bottles of alcohol are sold one by one, and the rest is consumed by the personnel. What is the probability of selling 4 whiskeys among the 6 bottles? Assume that every bottle has an equal chance of being bought.

A. 2/5
B. 3/5
C. 2/3
D. 1/2
E. 4/7

[spoiler]OA: D[/spoiler]

PS: If this problem dint look easy, then u havent drunk enough ;-)
Top
Source: — Problem Solving |
Legendary Member
Posts: 829
Joined: Mon Jul 07, 2008 10:09 pm
Location: INDIA
Thanked: 84 times
Followed by:3 members

Re: Drinking problem!!

by sudhir3127 » Wed Dec 31, 2008 8:24 pm
vittalgmat wrote:Wishing every one a happy new year 2009. While drinking alchohol, here is an easy problem to solve...

A store buys 10 bottles of alcohol, including 7 bottles of whiskeys. In the evening, 6 bottles of alcohol are sold one by one, and the rest is consumed by the personnel. What is the probability of selling 4 whiskeys among the 6 bottles? Assume that every bottle has an equal chance of being bought.

A. 2/5
B. 3/5
C. 2/3
D. 1/2
E. 4/7

[spoiler]OA: D[/spoiler]

PS: If this problem dint look easy, then u havent drunk enough ;-)

7C4( 4 whiskey bottles)* 3C2( other bottles)/10C6

105/210 = 1/2

hope that helps...

Happy New Yr to All !!!!
Top
Post new topic Post Reply
• Page 1 of 1