At a telephone enquiry system the number of phone calls received regarding relevant inquiry follows probability distribution with an average of 5 phone calls during 10 minute time interval. The probability that there is at the most one phone call during a 10 minute period is___

At a telephone enquiry system the number of phone calls received regar

1.	At a telephone enquiry system the number of phone calls received regarding relevant inquiry follows probability distribution with an average of 5 phone calls during 10 minute time interval. The probability that there is at the most one phone call during a 10 minute period is___
Answer» At a telephone enquiry system the number of phone calls received regarding relevant inquiry follows probability distribution with an average of 5 phone calls during 10 minute time interval. The probability that there is at the most one phone call during a 10 minute period is___