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# Q: You have three boxes, each containing two balls, one

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Manager
Joined: 20 Nov 2006
Posts: 213

Kudos [?]: 18 [0], given: 0

Q: You have three boxes, each containing two balls, one [#permalink]

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23 Mar 2007, 09:15
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0% (00:00) correct 0% (00:00) wrong based on 1 sessions

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Q: You have three boxes, each containing two balls, one containing a black pair; one, a white pair; and the third, one white ball and one black ball. On each box are pictures of two balls - either two black ones, two white ones, or one white and one black. You are told that the markings on the boxes are all wrong. You are asked to ascertain the colors of the balls contained in each box.

Which of the following statements can be inferred from the above?

A. You can take out one ball from the box marked with two black balls and, without looking at the second ball, know what each box actually contains.

B. You can take out one ball from the box marked with two white balls and, without looking at the second ball, know what each box actually contains.

C. You can take out one ball from the box marked with one white ball and one black ball and, without lokking at the second ball, know what each box contains.

D. You cannot know which balls are contained in which box until you take a ball out of more than one box.

E. You cannot know which boxes contain which color balls until you take a ball out of all three boxes.

Kudos [?]: 18 [0], given: 0

Manager
Joined: 25 May 2006
Posts: 226

Kudos [?]: 73 [0], given: 0

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23 Mar 2007, 10:42
Nice question. I believe it's -C-
_________________

Who is John Galt?

Kudos [?]: 73 [0], given: 0

Senior Manager
Joined: 11 Feb 2007
Posts: 352

Kudos [?]: 183 [0], given: 0

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23 Mar 2007, 19:15
C.

Marked: ww bw bb
Contains: bb ww bw

or

Marked: ww bw bb
Contains: bw bb ww

In either way you know what's in the other two.

Interesting question

Kudos [?]: 183 [0], given: 0

Senior Manager
Joined: 24 Sep 2006
Posts: 272

Kudos [?]: 46 [0], given: 0

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23 Mar 2007, 20:35
I think this is a puzzle more than a CR question

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AimHigher

Kudos [?]: 46 [0], given: 0

23 Mar 2007, 20:35
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