In a telephone enquiry system, the number of phone calls regarding relevant enquiry follow poisson distribution with an average of five phone calls during 10-minute time intervals. The probability that there is at the most one phone call during a 10-minute time period is a)`(6)/(5^(e ))` b)`(5)/(6)` c)`(6)/(55)` d)`(6)/(e^(5))`

Options

A. `(6)/(5^(e ))`
B. `(5)/(6)`
C. `(6)/(55)`
D. `(6)/(e^(5))`

Answer

D