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posted by Anonymous on Friday, July 5, 2013 at 7:52pm.
The probability that it will rain on each of the next 5 days is 50%. What is the probability that it will rain for 3 of the next 5 days?
prob = C(5,3) (1/2)^3 (1/2)^2 = 10 (1/32) = 5/16
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