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People visiting video rental stores often rent more than one DVD at a time. The probability distribution for DVD rentals per customer at Video To GO is given in the following table. There is a five-video limit per customer at this store, so nobody ever rents more than five DVDs.
X P(X)
0 0.03 1 0.50 2 0.24 3 0.12 4 0.07 5 0.04
a. Find the mean or expected value of this probability distribution. ________
b. Find the standard deviation of this probability distribution. ________
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