Question: Consider the well failure data given below. Suppose that two failed wells are selected randomly (without replacement) for a follow-up review. (a) What is the

Consider the well failure data given below. Suppose that two failed wells are selected randomly (without replacement) for a follow-up review.

(a) What is the probability that both are from the gneiss geological formation group?

(b) What is the probability that both are from the same geological formation group?

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