The probability that your call to a service line is answered in less than 30 seconds is 0.65. Assume that your calls are independent. (a) If you call 13 times, what is the probability that exactly 9 of your calls are answered within 30 seconds? Round your answer to four decimal places (e.g. 98.7654). (b) If you call 20 times, what is the probability that at least 16 calls are answered in less than 30 seconds? Round your answer to four decimal places (e.g. 98.7654). (c) If you call 27 times, what is the mean number of calls that are answered in less than 30 seconds? Round your answer to the nearest integer.

The probability that your call to a service line is answered in less than 30 seconds is 0.65. Assume that your calls are independent. (a) If you call 13 times, what is the probability that exactly 9 of your calls are answered within 30 seconds? Round your answer to four decimal places (e.g. 98.7654). (b) If you call 20 times, what is the probability that at least 16 calls are answered in less than 30 seconds? Round your answer to four decimal places (e.g. 98.7654). (c) If you call 27 times, what is the mean number of calls that are answered in less than 30 seconds? Round your answer to the nearest integer.

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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