Question: 1) Let A = {1, 2, 3, 4} and B = {3, 6, 7}. Find A B and A B. 2) Suppose that A B

1) Let A = {1, 2, 3, 4} and B = {3, 6, 7}. Find A B and A B.

2) Suppose that A B = A. Can A and B be independent? If so, give the appropriate condition that would make them independent.

3) For events A and B, express the event "either A or B but not both" as a formula in terms of probabilities P (A), P (B), and P (A B).

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