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Answered

The service times for customers coming through a checkout counter in a retail
store are independent random variables with mean 1.5 minutes and variance 1.0.
Approximate the probability that 100 customers can be served in less than 2
hours of total service time.

Answer :

Answer:

38.2  %

Step-by-step explanation:

120/100 = 1.2 (average time)

(1.2 - 1.5)/1 = -.3

z table value for "-.3" is .3821

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