Question: Consider the non-failed wells in Exercises 3-31. Assume that four wells are selected randomly (without re- placement) for inspection. (a) What is the probability that

Consider the non-failed wells in Exercises  3-31.

Assume that four wells are selected randomly (without re- placement) for inspection.

(a) What is the probability that exactly two are selected from the Loch Raven Schist?

(b) What is the probability that one or more is selected from the Loch Raven Schist?

(c) What is the expected number selected from the Loch Raven Schist?

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