Question: Continuation of Exercise 4-90. (a) What is the probability that there are no calls within a two-hour interval? (b) If four non-overlapping one-half hour intervals

Continuation of Exercise 4-90.
(a) What is the probability that there are no calls within a two-hour interval?
(b) If four non-overlapping one-half hour intervals are selected, what is the probability that none of these intervals contains any call?
(c) Explain the relationship between the results in part (a) and (b).

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