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A bag contains 6 black chips numbered 1–6 respectively and 6 white chi

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Math Expert
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Joined: 02 Sep 2009
Posts: 58402
A bag contains 6 black chips numbered 1–6 respectively and 6 white chi  [#permalink]

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New post 17 Dec 2018, 01:09
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Difficulty:

  25% (medium)

Question Stats:

75% (01:12) correct 25% (01:30) wrong based on 47 sessions

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A bag contains 6 black chips numbered 1–6 respectively and 6 white chips numbered 1–6 respectively. If Pavel reaches into the bag of 12 chips and removes 2 chips, one after the other, without replacing them, what is the probability that he will pick black chip #3 and then white chip #3?

A. 1/144
B. 1/132
C. 1/12
D. 1/6
E. 1/5

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Re: A bag contains 6 black chips numbered 1–6 respectively and 6 white chi  [#permalink]

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New post 17 Dec 2018, 02:40
Bunuel wrote:
A bag contains 6 black chips numbered 1–6 respectively and 6 white chips numbered 1–6 respectively. If Pavel reaches into the bag of 12 chips and removes 2 chips, one after the other, without replacing them, what is the probability that he will pick black chip #3 and then white chip #3?

A. 1/144
B. 1/132
C. 1/12
D. 1/6
E. 1/5



1/12 * 1/11= 1/132 IMO B
GMAT Club Bot
Re: A bag contains 6 black chips numbered 1–6 respectively and 6 white chi   [#permalink] 17 Dec 2018, 02:40
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A bag contains 6 black chips numbered 1–6 respectively and 6 white chi

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