Short Answer
The probabilities that a customer entering a particular bookstore buys 0, 1, 2, 3, 4, or 5 books are 0.30, 0.20, 0.20, 0.15, 0.10, and 0.05 respectively.
-For the probability distribution above, find the standard deviation.
Correct Answer:

Verified
Correct Answer:
Verified
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