On an average, 7.4 calls are received by a telephone operator every 10 minutes. a. What is the probability that an operator will receive 35 calls over a span of 50 minutes?   b. What is the probability that an operator will receive more than 7 calls in 10 minutes?

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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On an average, 7.4 calls are received by a telephone operator every 10 minutes.

a. What is the probability that an operator will receive 35 calls over a span of 50 minutes?
 
b. What is the probability that an operator will receive more than 7 calls in 10 minutes?
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