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Old 10-10-2005, 01:18 PM
closer2313 closer2313 is offline
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Join Date: Dec 2004
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Default Simple Question

For some reason I can't get the right answer for this.

Suppose a vase has 15 balls, of which 8 are red and seven are black.

In how many ways can 5 balls be chosen so that at least two are red?
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