93. In a class of 75 students, 15 were considered to by veryintelligent, 45 as medium and the rest below average. The probability that avery intelligent student fails in a viva-voce examination is 0.005; the mediumstudent failing has a probability 0.05; and the corresponding probability for abelow average student is 0.15. If a student is known to have passed the viva-voce examination, what is the probability that he is below average ?

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Answered: 93. In a class of 75 students, 15 were…

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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The Jones family was one of the first to come to the U.S. They had 7 children. Assuming that the probability of a child being a girl is .5, find the probability that the Jones family had: at least 3 girls? at most 5 girls? > Next Question
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The probability that a randomly chosen American adult gets less than an average of 7 hours of sleep a night is 0.352. The probability that a randomly chosen American adult gets less than an average of 7 hours of sleep a night AND has at least one child under the age of three is 0.195. What is the probability that an American adult has at least one child under the age of three given that they get less than an average of 7 hours of sleep? 0.069 0.157 0.647 0.554
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