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red and blue chips

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Joined: 18 May 2008
Posts: 1305
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Kudos [?]: 57 [0], given: 0

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red and blue chips [#permalink] New post 18 Mar 2009, 02:35
00:00

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
There are 3 red chips and 2 blue chips. When arranged in a row, they form a certain color pattern, for example RBRRB. How many color patterns are possible?

What is wrong with my solution?
total no of patterns possible = 3! *2! =12
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Schools: Kellogg (R1 Dinged),Cornell (R2), Emory(Interview Scheduled), IESE (R1 Interviewed), ISB (Interviewed), LBS (R2), Vanderbilt (R3 Interviewed)
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Kudos [?]: 58 [0], given: 10

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Re: red and blue chips [#permalink] New post 18 Mar 2009, 04:36
Ans 10.

Question is saying number of pattern possible. Ur solution also includes similar patterns. For example. RRBBR, RRBBR,

So I guess the solution could be 5!/3!*2!= 10.

What is OA?
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Joined: 18 May 2008
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Re: red and blue chips [#permalink] New post 18 Mar 2009, 04:39
oh yes. silly mistake of mine. thanks OA is 10 indeed
Re: red and blue chips   [#permalink] 18 Mar 2009, 04:39
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