Question: Refer to the previous exercise. a. What is the expected number of calls among the 25 that involve a fax message? b. What is the

Refer to the previous exercise.

a. What is the expected number of calls among the 25 that involve a fax message?

b. What is the standard deviation of the number among the 25 calls that involve a fax message?

c. What is the probability that the number of calls among the 25 that involve a fax transmission exceeds the expected number by more than 2 standard deviations?

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