At a certain school, 25% of the students wear a watch and 30% wear a bracelet. 60% of the students wear neither a watch nor a bracelet. (a) One of the students is chosen at random. What is the probability that this student is wearing a watch or a bracelet? (b) What is the probability that this student is wearing both a watch and a bracelet?

At a certain school, 25% of the students wear a watch and 30% wear a bracelet. 60% of the students wear neither a watch nor a bracelet. (a) One of the students is chosen at random. What is the probability that this student is wearing a watch or a bracelet? (b) What is the probability that this student is wearing both a watch and a bracelet?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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At a certain school, 25% of the students wear a watch and 30% wear a bracelet. 60% of the students wear neither a watch nor a bracelet.

(a) One of the students is chosen at random. What is the probability that this student is wearing a watch or a bracelet?

(b) What is the probability that this student is wearing both a watch and a bracelet?

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