Determine the expected number of complaint calls


The marketing manager of company has noted that she basically receives 10 complaint calls from customers throughout a week (suppose a week has 7 days), and that the calls are independent.

(a) Determine the probability that she receives exactly 5 complaint calls in one week.

(b) Determine the probability that she receives at least 2 complaint calls in one day.

(c) Determine the expected number of complaint calls in one month (assume a month has 30 days).

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