3. At a high school movie night, the refreshment stand sells popcorn and soft drinks. Of the 100 students who came to the movie, 62 bought popcorn and 47 bought a drink. 38 students bought both popcorn and a drink. Part A: What is the probability that a student buys a drink? Express your answer as a percentage. Part B: What is the probability that a student buys a drink, given that he or she buys popcorn? Express your answer as a percentage, rounded to the nearest tenth. Part C: Are buying a drink and buying popcorn independent or dependent events? Justify your answer.

3. At a high school movie night, the refreshment stand sells popcorn and soft drinks. Of the 100 students who came to the movie, 62 bought popcorn and 47 bought a drink. 38 students bought both popcorn and a drink. Part A: What is the probability that a student buys a drink? Express your answer as a percentage. Part B: What is the probability that a student buys a drink, given that he or she buys popcorn? Express your answer as a percentage, rounded to the nearest tenth. Part C: Are buying a drink and buying popcorn independent or dependent events? Justify your answer.

Calculus For The Life Sciences

2nd Edition

ISBN:9780321964038

Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Chapter12: Probability

Section12.3: Conditional Probability; Independent Events; Bayes' Theorem

Problem 44E

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