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Statement of a problem № m659

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A lot contains 15 castings from a local supplier and 25 castings from a supplier in the next state. Two castings are selected randomly, without replacement, from the lot of 40. Let A be the event that the first casting selected is from the local supplier, and let B denote the event that the second casting is selected from the local supplier. Determine: (a) P (A) (b) P (B|A) (c) P (A ∩ B) (D) P (A U B)

Solution:
A lot contains 15 castings from a local supplier and 25 castings from a supplier

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