<PRE><B>Question 1063395</B>
We will us the binomial probability(P) distribution
:
P ( k = 30 ) = 100C30 * (0.2)^30 * (0.8)^70 = 0.005
:
Note that 100C30 = 100! / (30! * (100-30)!)
:
mean of the sample is 0.02
standard deviation of the sample is square root(0.20 * 0.80/100) = 0.04
:
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