ABC Bank has an average of 9 customer every two hours.
ABC Bank has an average of 9 customer every two hours.
a) Find the probability that exactly 40 customers come to the bank in a day (assume the bank operates for 8 hours a day).
b) Find the probability at least 3 customers come to the bank during an hour.
c) Find the probability at most 3 customers come to the bank for three hours.
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