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What is the probability that a transistor of this type will last at most 50 weeks? b. What is the probability that a transistor of this type will not survive the first 35 weeks?

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

The lifetime, in weeks, of a certain type of transistor is known to follow a normal distribution with mean 40 weeks and standard deviation 5 weeks.

a. What is the probability that a transistor of this type will last at most 50 weeks?

b. What is the probability that a transistor of this type will not survive the first 35 weeks?

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