Question: Two good transistors become mixed up with three defective transistors. A person is assigned to sampling the mixture by drawing out three items without replacement.

Two good transistors become mixed up with three defective transistors. A person is assigned to sampling the mixture by drawing out three items without replacement.

However, the instructions are not followed and the first item is replaced, but the second and third items are not replaced.

(a) What is the probability the sample contains exactly two items that test as good?

(b) What is the probability the two items finally drawn are both good transistors?

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