(1) What is the probability that a randomly selected purchaser has a DVD player that will need warranty repair work? (2) If a customer returns to the store with a DVD player that needs warranty repair work, what is the probability that it is a brand 1 DVD player?

(1) What is the probability that a randomly selected purchaser has a DVD player that will need warranty repair work? (2) If a customer returns to the store with a DVD player that needs warranty repair work, what is the probability that it is a brand 1 DVD player?

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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Question

Transcribed Image Text:A chain of video stores sells three different brands of DVD players. Of its DVD player sales, 70% are brand 1, 20% are brand 2, and 10% are brand 3. It is known that 10% of brand 1's DVD players require warranty repair work, whereas the corresponding percentages for brands 2 and 3 are 4% and 2%, respectively. (1) What is the probability that a randomly selected purchaser has a DVD player that will need warranty repair work? (2) If a customer returns to the store with a DVD player that needs warranty repair work, what is the probability that it is a brand 1 DVD player?

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