(Answered) Question a batch of 10 fuses contains three defective ones

Statistics

Question: A batch of 10 fuses contains three defective ones. A sample of size two is taken at random and without replacement.

(a) Find the probability that the sample contains no defective fuses.

(b) Let X be the random variable denoting the number of defective fuses in the sample. Find the probability mass function of X.

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