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Using a Distribution to Find Probabilities In
Chapter 4, Problem 11E(choose chapter or problem)
Problem 11E
Using a Distribution to Find Probabilities In Exercise, 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.
Telephone Sales 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.
Questions & Answers
QUESTION:
Problem 11E
Using a Distribution to Find Probabilities In Exercise, 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.
Telephone Sales 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.
ANSWER:
Solution:
Step 1 of 3:
The probability that you will make a sale on any given telephone call is 0.19.
We have to find the following probabilities.
- The first sale on the fifth call.
- First sale on the first, second, or third call.
- Do not make sale on the first three calls.
We also want determine whether the events are unusual or not.