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Question: When a part is selected at random from a particular production batch, there is a probability q that the part is defective. Thus, out of n independently selected parts, the number K of defective units is a random variable with the binomial probability distribution
p[K = k] = n! qk(1 - q)n - k), for k = 0, 1, 2,.....,n k!(n - k)!
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