Question: Consider the well failure data in Exercise 2-53. Suppose that two failed wells are selected randomly (without replacement) for a follow-up review. (a) What is

Consider the well failure data in Exercise 2-53.

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 geo- logical formation group?

(b) What is the probability that both are from the same geo- logical formation group?

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