The average number of customers entering a bank is 4 every 18 minutes. If each teller can accommodate 1 customer every 12 minutes, then what is the minimum number of tellers that the bank should have to accommodate all of its customers? O1 O2 O3 O4 What is the probability that 10 customers will enter the bank in one hour? O0. 1799 O0.0799 O0.2799 O0.3799 What is the variance number of customers entering the bank in 1 hour? O13.3 O3.7 O7.3 O0.73