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Often in buying a product at a supermarket, there is a concernabout that item being underweight. Suppose there are 20 "one-pound"packages of frozen gr

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asked 2021-01-28
Often in buying a product at a supermarket, there is a concernabout that item being underweight. Suppose there are 20 "one-pound"packages of frozen ground turkey on display and 3 of them areunderweight. A consumer group buys five of the 20 packages atrandom. What is the probability of at least one of the five beingunderweight?
Suppose that a school has 20 classes: 16 with 25 students ineach, three with 100 students in each, and one with 300 studentsfor a total of 1000 students.
(a) What is the average class size?
(b) Select a student randomly out of the 1000 students. Letthe random variable X equal the size of the class to which thisstudent belongs and define the p.m.f. of X.
(c) Find E(X), the expected value of X. Does this answersurprise you?

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2021-01-29
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