2-79. A batch of 25 injection-molded parts contains 5 that have suffered excessive shrinkage. (a) If two parts are selected at random, and without replace- ment, what is the probability that the second part selected is one with excessive shrinkage? (b) If three parts are selected at random, and without replace- ment, what is the probability that the third part selected is one with excessive shrinkage?
2-79. A batch of 25 injection-molded parts contains 5 that have suffered excessive shrinkage. (a) If two parts are selected at random, and without replace- ment, what is the probability that the second part selected is one with excessive shrinkage? (b) If three parts are selected at random, and without replace- ment, what is the probability that the third part selected is one with excessive shrinkage?
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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