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Get Full Access to Probability And Statistics For Engineers And The Scientists - 9 Edition - Chapter 2 - Problem 34e
Get Full Access to Probability And Statistics For Engineers And The Scientists - 9 Edition - Chapter 2 - Problem 34e

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# Computer keyboard failures can be attributed to electrical

ISBN: 9780321629111 32

## Solution for problem 34E Chapter 2

Probability and Statistics for Engineers and the Scientists | 9th Edition

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Problem 34E

Computer keyboard failures can be attributed to electrical defects or mechanical defects. A repair facility currently has 25 failed keyboards, 6 of which have electrical defects and 19 of which have mechanical defects. a. ?How many ways are there to randomly select 5 of these keyboards for a thorough inspection (without regard to order)? b. ?In how many ways can a sample of 5 keyboards be selected so that exactly two have an electrical defect? c. ?If a sample of 5 keyboards is randomly selected, what is the probability that at least 4 of these will have a mechanical defect?

Step-by-Step Solution:

Answer: Step 1: Computer keyboard failures can be attributed to electrical defects or mechanical defects. A repair facility currently has 25 failed keyboards, 6 of which have electrical defects and 19 of which have mechanical defects.

Step 2 of 4

Step 3 of 4

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