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Intern
Joined: 04 May 2015
Posts: 17
PS   [#permalink]

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28 Oct 2017, 07:40
In a room filled with 7 people, 4people have exactly 1sibling in room and 3 people have exactly 2 siblings in the room. If the individuals are selected from room at random,What is the probability that those two individuals are not siblings?
A. 5/21
B. 3/7
C. 4/7
D. 5/7
E. 16/21

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Intern
Joined: 08 Oct 2017
Posts: 24
Re: PS  [#permalink]

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28 Oct 2017, 08:19
answer?
Intern
Joined: 04 May 2015
Posts: 17
Re: PS  [#permalink]

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28 Oct 2017, 08:25
gauravtech1988 wrote:
answer?

answer:E
Math Expert
Joined: 02 Sep 2009
Posts: 49300
Re: PS  [#permalink]

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28 Oct 2017, 08:46
ank4u wrote:
In a room filled with 7 people, 4people have exactly 1sibling in room and 3 people have exactly 2 siblings in the room. If the individuals are selected from room at random,What is the probability that those two individuals are not siblings?
A. 5/21
B. 3/7
C. 4/7
D. 5/7
E. 16/21

Sent from my Redmi Note 3 using GMAT Club Forum mobile app

Please read carefully and follow our RULES OF POSTING. Thank you.

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

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Re: PS &nbs [#permalink] 28 Oct 2017, 08:46
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