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Like the one from OG Ben and Ann are among 7

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Joined: 03 Feb 2003
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Like the one from OG Ben and Ann are among 7 [#permalink]  01 Jul 2003, 01:42
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Like the one from OG

Ben and Ann are among 7 contestants from which 4 semifinalists are to be selected. Of the different possible selections, how many contain Ben but not Ann?

How many contain Ann but not Ben?
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Joined: 24 Jun 2003
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Re: PS: LIKE OG [#permalink]  01 Jul 2003, 02:32
stolyar wrote:
Like the one from OG

Ben and Ann are among 7 contestants from which 4 semifinalists are to be selected. Of the different possible selections, how many contain Ben but not Ann?

How many contain Ann but not Ben?

The answer to both questions is the same.

Favourable outcomes = 1C1*5C3 = 10

Total outcomes = 7C4 = 35
Re: PS: LIKE OG   [#permalink] 01 Jul 2003, 02:32
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