A sociology teacher asked her students to complete a survey at the beginning of the year. One survey question asked, "How responsible are you?" Another question asked, "How many siblings do you have?" The probability that a student is responsible is 0.3, the probability that a student has 3 or more siblings is 0.8 and the probability that a student is responsible and has 3 or more siblings is 0.2. What is the probability that a randomly chosen student is responsible or has 3 or more siblings?

A sociology teacher asked her students to complete a survey at the beginning of the year. One survey question asked, "How responsible are you?" Another question asked, "How many siblings do you have?" The probability that a student is responsible is 0.3, the probability that a student has 3 or more siblings is 0.8 and the probability that a student is responsible and has 3 or more siblings is 0.2. What is the probability that a randomly chosen student is responsible or has 3 or more siblings?

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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