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Two friends are both pregnant, and find out they are each expecting twins!• Let A be the event that one friend is pregnant with identical twins, and note that P(A) = 0.0045.. Let B be the event that the other friend is pregnant with fraternal twins, and note that P(B) = 0.01.A and B are independent events. What is the probability that one friend is pregnant with identical twins,and one friend is pregnant with fraternal twins.

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Given that the two events A and B are independent, it follows that the probabilty

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