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Question

A researcher has to consult a recently

published book. The probability of it being available is 0.5 for library A and 0.7 for library B. Assuming the two events to be statistically independent, what is the probability of the book being available in library A and not available in library B?

A 0.7

B 0.9

C 0.3

D 0.15

E 0.21

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