Question 5

A salesman normally makes a sale (closes) on 60% of his presentations. Assuming the presentations are independent, find the probability of the following.

a) He fails to close for the first time on his fifth attempt.

b) He closes his first presentation on his

fourth attempt.

c) The first presentation he closes will be on his second attempt

.d) The first presentation he closes will be on one of his first three attempts.

a) P(X = 5) = (Round to four decimal places as needed.) b) P(X = 4) = (Round to four decimal places as needed.) c) P(X = 2) = (Round to four decimal places as needed.) d) The probability the first presentation he closes will be on one of his first three attempts is (Round to four decimal places as needed.)