A total of 60% of the customers of a fast food chain order a hamburger, French fries, and a drink. If a random sample of 15 cash register receipts is selected, what is the probability that 10 or more will show that the above three food items were ordered?
A) 1.000
B) 0.186
C) 0.403
D) 0.000

Question

Quizplus · Accepted Answer

We can model this situation using a binomial distribution with n = 15 and p = 0.6 (the probability of ordering the required food items). We are interested in finding the probability of getting at least 10 successes (orders of the required food items) in 15 trials. Using a calculator or software, we can find that P(X >= 10) = 0.403, which is the answer choice C. Therefore, the best choice is C.

A Total of 60% of the Customers of a Fast