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November 23, 2014

November 23, 2014

Posted by **amy** on Wednesday, September 15, 2010 at 10:40pm.

How many of these casts include Ann?

- math -
**Reiny**, Wednesday, September 15, 2010 at 10:45pmIf Ann is in, then we need 1 male from the 5 men, and 4 more females from the remaining 6 women

Number of casts = 1 x C(5,1) x C(6,4) = 75

or

number of ways with no restriction = C(5,1) x C(7,5) = 105

number of ways without Ann = C(5,1) x C(6,5) = 30

So number of ways with Ann = 105-30 = 75

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