A batch of 10 fuses contains three defective ones a sample


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.

(c) Given that X = 1, what is the probability that the defective fuse was the first one selected?

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Basic Statistics: A batch of 10 fuses contains three defective ones a sample
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