In a certain school of blind people, it is known that 1/4 of the blind are under 7 years of age. It is also known that 1/5 of all the blind are male and that 3/5 of the blind are female or 7 years of age or older. What is the probability that a blind person selected at random from this school is male or under 7 years old. *
In a certain school of blind people, it is known that 1/4 of the blind are under 7 years of age. It is also known that 1/5 of all the blind are male and that 3/5 of the blind are female or 7 years of age or older. What is the probability that a blind person selected at random from this school is male or under 7 years old. *
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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