Question

On average, there are 8 customers arrives a local bank per hour. Bob is the only bank teller on duty at the bank currently and needs to run out for 6 minutes. What is the probability that no customer will arrive in the next 6 minutes

Answer 1

The probability that no customer will arrive in the next 6 minutes is 1.2 minutes or ratio of 0.2

Step-by-step explanation:

Expected value is the value on the probability of occurrence of the values.

Expected Time consumed on customer in an hour = 8 x 6 = 48 minutes

Probability of customer arrives = 48/60 = 0.8

Probability that customer will not arrive = 1 - 0.8 = 0.2

Expected time Customer will not come in 6 minutes = 6 x 0.2 = 1.2 minutes