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The examination results of a large group of students in statistics are approximately normally distributed with a mean of 60 and a standard deviation of 9. If a student is chosen at random, what is the probability that his score is a. below 45? b. above 73? c. below 85? d. between 50 and 75?

The examination results of a large group of students in statistics are approximately normally distributed with a mean of 60 and a standard deviation of 9. If a student is chosen at random, what is the probability that his score is a. below 45? b. above 73? c. below 85? d. between 50 and 75?

A First Course in Probability (10th Edition)
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 examination results of a large group of students in statistics are approximately normally distributed with a mean of 60 and a standard deviation of 9. If a student is chosen at random, what is the probability that his score is a. below 45? b. above 73? c. below 85? d. between 50 and 75?
Transcribed Image Text:The examination results of a large group of students in statistics are approximately normally distributed with a mean of 60 and a standard deviation of 9. If a student is chosen at random, what is the probability that his score is a. below 45? b. above 73? c. below 85? d. between 50 and 75?
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