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# red and blue chips

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VP
Joined: 18 May 2008
Posts: 1265
Followers: 17

Kudos [?]: 447 [0], given: 0

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18 Mar 2009, 02:35
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This topic is locked. If you want to discuss this question please re-post it in the respective forum.

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
Manager
Joined: 22 Feb 2009
Posts: 138
Schools: Kellogg (R1 Dinged),Cornell (R2), Emory(Interview Scheduled), IESE (R1 Interviewed), ISB (Interviewed), LBS (R2), Vanderbilt (R3 Interviewed)
Followers: 8

Kudos [?]: 133 [0], given: 10

Re: red and blue chips [#permalink]

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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?
VP
Joined: 18 May 2008
Posts: 1265
Followers: 17

Kudos [?]: 447 [0], given: 0

Re: red and blue chips [#permalink]

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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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