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.)
Added by Marilyn C.
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This can be calculated using the probability of failure (0.4) for the first four attempts and the probability of success (0.6) on the fifth attempt. \[ P(X = 5) = 0.4 \times 0.4 \times 0.4 \times 0.4 \times 0.6 = 0.0154 \] Show more…
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A salesman normally makes a sale (closes) on 60% of his presentations. Assuming the presentations are independent, find the probability of each of the following. a) He fails to close for the first time on his fourth attempt. b) He closes his first presentation on his third 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) The probability he fails to close for the first time on his fourth attempt is (Round to four decimal places as needed.)
Evelyn C.
A salesman normally makes a sale (closes) on 75% of his presentations. Assuming the presentations are independent, find the probability of each 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) The probability he fails to close for the first time on his fifth attempt is nothing. (Round to four decimal places as needed.) b) The probability he closes his first presentation on his fourth attempt is nothing. (Round to four decimal places as needed.) c) The probability the first presentation he closes will be on his second attempt is nothing. (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 nothing. (Round to four decimal places as needed.)
Kumar A.
Find the indicated probabilities using the geometric distribution, the Poisson distribution, or the binomial distribution. Then determine whether the events are unusual. If convenient, use a table or technology to find the probabilities. The probability that you will make a sale on any given telephone call is 0.19. Find the probability that you (a) make your first sale on the fifth call, (b) make your first sale on the first, second, or third call, and (c) do not make a sale on the first three calls.
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