Statistics
posted by Victor .
Cellular Phone Sales The probability that a cellular phone company kiosk sells X number of new phone contracts per day is shown below. Find the mean, variance, and standard deviation for this probability distribution.
X
4
5
6
8
10
P (X)
0.4
0.3
0.1
0.15
0.05
What is the probability that they will sell 6 or more contracts three days in a row?
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