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At a school's open house, T-shirts and sweatshirts were sold. Each item was purchased by either a student or a parent. The two-way frequency table summarizes a random sample of 50 items sold that night. T-shirt Sweatshirt Student 8 12 Parent 19 11 Let T-shirt be the event that an item randomly chosen from among those sold was a T-shirt. Let student be the event that an item randomly chosen from among those sold was purchased by a student. Find the following probabilities. Write your answers as decimals. (If necessary, consult a list of formulas.) (a) P(student) = 0 (b) P(T-shirt and student) (c) P(T-shirt | student) =

At a school's open house, T-shirts and sweatshirts were sold. Each item was purchased by either a student or a parent. The two-way frequency table summarizes a random sample of 50 items sold that night. T-shirt Sweatshirt Student 8 12 Parent 19 11 Let T-shirt be the event that an item randomly chosen from among those sold was a T-shirt. Let student be the event that an item randomly chosen from among those sold was purchased by a student. Find the following probabilities. Write your answers as decimals. (If necessary, consult a list of formulas.) (a) P(student) = 0 (b) P(T-shirt and student) (c) P(T-shirt | student) =

College Algebra
College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 50E: Flexible Work Hours In a recent survey, people were asked whether they would prefer to work flexible...
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O PROBABILITY Computing conditional probability using a two-way frequency... At a school's open house, T-shirts and sweatshirts were sold. Each item was purchased by either a student or a parent. The two-way frequency table summarizes a random sample of 50 items sold that night. T-shirt Sweatshirt Student 8 12 Let T-shirt be the event that an item randomly chosen from among those sold was a T-shirt. Let student be the event that item randomly chosen from among those sold was purchased by a student. Find the following probabilities. Write your answers as decimals. (If necessary, consult a list of formulas.) (a) P(student) = (b) P(T-shirt and student) = (c) P(T-shirt | student) = X Parent 19 11
Transcribed Image Text:O PROBABILITY Computing conditional probability using a two-way frequency... At a school's open house, T-shirts and sweatshirts were sold. Each item was purchased by either a student or a parent. The two-way frequency table summarizes a random sample of 50 items sold that night. T-shirt Sweatshirt Student 8 12 Let T-shirt be the event that an item randomly chosen from among those sold was a T-shirt. Let student be the event that item randomly chosen from among those sold was purchased by a student. Find the following probabilities. Write your answers as decimals. (If necessary, consult a list of formulas.) (a) P(student) = (b) P(T-shirt and student) = (c) P(T-shirt | student) = X Parent 19 11
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