# Fifteen items or less: The number of customers in line at a supermarket express checkout counter...

###### Question:

Fifteen items or less: The number of customers in line at a supermarket express checkout counter is a random variable with the following probability distribution. 1 0.15 2 0.30 3 0.20 4 0.10 5 0.05 P(x) 0.20 Send data to Excel Part 1 of 7 (a) Find P(5). P(5) = 0 Part 2 of 7 (b) Find P(No less than 4). P(No less than 4) = Part 3 of 7 (c) Find the probability that no one is in line. The probability that no one is in line is
Part 4 of 7 (d) Find the probability that at least three people are in line. The probability that at least three people are in line is Part 5 of 7 (e) Compute the mean H. Round the answer to two decimal places. Hy = 0 Part 6 of 7 (f) Compute the standard deviation o. Round the answer to three decimal places. Part 7 of 7 (9) If each customer takes 3 minutes to check out, what is the probability that it will take more than 6 minutes for all the customers currently in line to check out? The probability that it will take more than 6 minutes for all the customers currently in line to check out is

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