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A particular telephone number is used to receive both voice calls and fax messages. Suppose that 20% of the incoming calls involve fax messages, and consider a sample of 20 incoming calls. (Round your answers to three decimal places.) (a) What is the probability that at most 8 of the calls involve a fax message? (b) What is the probability that exactly 8 of the calls involve a fax message? (c) What is the probability that at least 8 of the calls involve a fax message? (d) What is the probability that more than 8 of the calls involve a fax message?

A particular telephone number is used to receive both voice calls and fax messages. Suppose that 20% of the incoming calls involve fax messages, and consider a sample of 20 incoming calls. (Round your answers to three decimal places.) (a) What is the probability that at most 8 of the calls involve a fax message? (b) What is the probability that exactly 8 of the calls involve a fax message? (c) What is the probability that at least 8 of the calls involve a fax message? (d) What is the probability that more than 8 of the calls involve a fax message?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.8: Probabilities Of Disjoint And Overlapping Events
Problem 2C
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A particular telephone number is used to receive both voice calls and fax messages. Suppose that 20% of the incoming calls involve fax messages, and consider a sample of 20 incoming calls. (Round your answers to three decimal places.) (a) What is the probability that at most 8 of the calls involve a fax message? (b) What is the probability that exactly 8 of the calls involve a fax message? (c) What is the probability that at least 8 of the calls involve a fax message? (d) What is the probability that more than 8 of the calls involve a fax message?
Transcribed Image Text:A particular telephone number is used to receive both voice calls and fax messages. Suppose that 20% of the incoming calls involve fax messages, and consider a sample of 20 incoming calls. (Round your answers to three decimal places.) (a) What is the probability that at most 8 of the calls involve a fax message? (b) What is the probability that exactly 8 of the calls involve a fax message? (c) What is the probability that at least 8 of the calls involve a fax message? (d) What is the probability that more than 8 of the calls involve a fax message?
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