A Local Radio Station Maintains a Very Popular Phone Service,which

Multiple Choice

A local radio station maintains a very popular phone service,which provides callers with current weather reports.The incoming calls have a Poisson distribution with an average of 5 calls for each 15 minute-period.If x = time between calls,then the probability of receiving four or fewer calls in the next 15 minutes is:

A) 0.2341.
B) 0.7659.
C) 0.2636.
D) 0.7364.
E) 0.9502.