A box containing a dozen of capacitors contains 4 that are defective. If 3 capacitors are selected at random, what is the probability that at least 1 of them is good?

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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7
A box containing a dozen of capacitors contains 4 that are defective. If 3
capacitors are selected at random, what is the probability that at least 1
of them is good?
6
An office employs eight women and seven men. Three employees will
be randomly selected for drug screening. What is the probability that
both employees will be women?
5
A pen case contains 2 red pens, 5 blue pens and 4 black pens. If a pen
is chosen at random from the case, what is the probability that it is not
red?
Transcribed Image Text:7 A box containing a dozen of capacitors contains 4 that are defective. If 3 capacitors are selected at random, what is the probability that at least 1 of them is good? 6 An office employs eight women and seven men. Three employees will be randomly selected for drug screening. What is the probability that both employees will be women? 5 A pen case contains 2 red pens, 5 blue pens and 4 black pens. If a pen is chosen at random from the case, what is the probability that it is not red?
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