### Estimating probability values-discrete distribution

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A chain of rental stores would like to determine the number of exercise bicycles to stock at each of its stores. The probability distribution of x, the daily demand of exercise bicycles at a particular store is given in the following table.

 x 0 1 2 3 4 P(x) 0.15 0.28 0.4 0.1 0.07

A. The probability that the daily demand at this store is at least one and at most three is:

a) 0.78
b) 0.93
c) 0.85
d) 0.28
e) 2

B. Find the expected number of the daily demand at this store.

a) 0
b) 74
c) 1.25
d) 1.66
e) 2.27

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