Question: (20 pts.) (Sections 5.2 & 5.3 in book) Let x be the number of PC computers repaired at the Best Buy in Green Acres Mall

(20 pts.) (Sections 5.2 & 5.3 in book) Let x be the number of PC computers repaired at the Best Buy in Green Acres Mall on a randomly selected day. This data is represented in the discrete probability distribution below.

X P(X)

1 0.16
2 0.22

3? 4 0.2 5 0.14

a) Find the probability that exactly 3 computers were repaired that day. b) Find the mean of this probability distribution.

c) Find the standard deviation of this probability distribution.

d) Find the probability that at most 4 computers were repaired that day. Solutions:

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