Which financial service assures that customers are able to write checks or use debit cards to take money out of accounts to pay for things without the inconvenience of going to the bank for cash? A. payment services B. savings C. loans D. financial planning

Customers arrive at rich dunn's styling shop at a rate of 3 per hour, distributed in a poisson fashion. rich can perform an average of 5 haircuts per hour, according to a negative exponential distribution.a) the average number of customers waiting for haircuts= customersb) the average number of customers in the shop= customersc) the average time a customer waits until it is his or her turn= minutesd) the average time a customer spends in the shop= minutese) the percentage of time that rich is busy= percent