1) John Doe is the top salesman for his company. Records indicate that he makes a sale on 70% of his sales calls. If he calls on four potential clients, what is the probability that he makes exactly 3 sales? What is the probability that he makes exactly 4 sales?
2) The time to complete a construction project is normally distributed with a mean of 60 weeks and a standard deviation of 4 weeks.
(a) What is the probability the project will be finished in 62 weeks or less?
(b) What is the probability the project will be finished in 66 weeks or less?
(c) What is the probability that the project will take longer than 65 weeks?