# Question

The amount of time taken by a bank teller to serve a randomly selected customer has a normal distribution with a mean of 2 minutes and a standard deviation of .5 minute.

a. What is the probability that both of two randomly selected customers will take less than 1 minutes each to be served?

b. What is the probability that at least one of four randomly selected customers will need more than 2.25 minutes to be served?

a. What is the probability that both of two randomly selected customers will take less than 1 minutes each to be served?

b. What is the probability that at least one of four randomly selected customers will need more than 2.25 minutes to be served?

## Answer to relevant Questions

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