You are working in a bank. You have collected enough data to determine the

average time needed to serve one customer and found that it follows a normal

distribution with Mean = 4.78 minutes and SD = 1.32 minutes.

1. What is the probability that you will serve 10 customers every hour?

2. What is the probability that you will serve more than 15 customers every

hour?

3. What is the probability that you will serve between 10 & 15 customers every

hour?

4. What is the number of customers you will be 95% confident that you will

serve every hour?