According to a recent study, 50 % of adult smokers started smoking before 21 years old. A random sample of 11 smokers age 21 years or older is selected, and the number of smokers who started smoking before 21 is recorded. Calculate the following probabilities. Round solutions to four decimal places, if necessary. 1. The probability that at least 8 of them started smoking before 21 years of age is P(x > 8) = 2. The probability that at most 5 of them started smoking before 21 years of age is P(r < 5) = 3. The probability that exactly 8 of them started smoking before 21 years of age is P(z = 8)

According to a recent study, 50 % of adult smokers started smoking before 21 years old. A random sample of 11 smokers age 21 years or older is selected, and the number of smokers who started smoking before 21 is recorded. Calculate the following probabilities. Round solutions to four decimal places, if necessary. 1. The probability that at least 8 of them started smoking before 21 years of age is P(x > 8) = 2. The probability that at most 5 of them started smoking before 21 years of age is P(r < 5) = 3. The probability that exactly 8 of them started smoking before 21 years of age is P(z = 8)

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.8: Probabilities Of Disjoint And Overlapping Events

Problem 2C

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