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Question: A fast-food restaurant sells hamburgers and chicken sandwiches. On a typical weekday the demand for hamburgers is normally distributed with mean 313 and standard deviation 57; the demand for chicken sandwiches is normally distributed with mean 93 and standard deviation 22.
a. How many hamburgers must the restaurant stock to be 98% sure of not running out on a given day? b. Answer part a for chicken sandwiches.
c. If the restaurant stocks 400 hamburgers and 150 chicken sandwiches for a given day, what is the probability that it will run out of hamburgers or chicken sandwiches (or both) that day? Assume that the demand for hamburgers and the demand for chicken sandwiches are probabilistically independent.
d. Why is the independence assumption in part c probably not realistic? Using a more realistic assumption, do you think the probability requested in part c would increase or decrease?
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