Answered: If one of these lightbulbs is selected…

Math

Probability

If one of these lightbulbs is selected at random, find the probability that the lightbulb is defective.

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

A quality control inspector is checking a sample of lightbulbs for defects. The table summarizes the results. If one of these lightbulbs is selected at random, find the probability that the lightbulb is

defective.

Wattage	Good	Defective	Total
20	62	9	71
50	100	14	114
100	82	13	95
Total	244	36	280

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