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You're going to put 6 pictures on the wall. The 6 pictures

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You're going to put 6 pictures on the wall. The 6 pictures [#permalink] New post 24 Nov 2005, 05:28
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You're going to put 6 pictures on the wall. The 6 pictures are all different from one another in size. In how many cases can you put 2 biggest pictures side by side? (The second biggest picture next to the biggest picture)
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 [#permalink] New post 24 Nov 2005, 08:38
Consider the biggest and sencond biggest as one entity. So there are 5 entities. They can be arranged in 5! ways. The two big and small ones can be arranged in 2 ways among themselves.

ie 5! * 2 = 240.
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 [#permalink] New post 24 Nov 2005, 08:53
4! (number of other picture permutations)*5 (number of XL & L picture settings)*2 (reverse setting possibilities)= 240
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Re: PS - Pictures [#permalink] New post 24 Nov 2005, 09:13
both approaches are correct and same.

= 2x5x4! = 2x5!=120
Re: PS - Pictures   [#permalink] 24 Nov 2005, 09:13
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You're going to put 6 pictures on the wall. The 6 pictures

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