Posted by Mike on Sunday, March 2, 2008 at 4:34pm.
The local video store has determined that 65% of the store's customers are women. What is the probability that the next 3 customers will be women? Round to the nearest percent.

Math  Damon, Sunday, March 2, 2008 at 4:58pm
p = .65
(1p) = .35
binomial distribution, n = 3
binomial coefs for n = 3 are 1, 3, 3, 1
probability of three women, zero men in three = coef(3,0)(p)^3 (1p)^0
= 1 (.65)^3 (1)
= .2746 = 27%
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