The average number of dropouts for a school district has been 305 per year with a standard devia- tion of 50. What is the probability that the number of dropouts next year will be a. more than 400? b. between 250 and 350? c. between 300 and 350?

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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The average number of dropouts for a school district has been 305 per year with a standard devia- tion of 50. What is the probability that the number of dropouts next year will be

a. more than 400?

b. between 250 and 350?

c. between 300 and 350?

d. between 350 and 375?

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