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a) Who is right, or are they both right, or are neither of them right? Explain briefly. b) Which way sounds easier to you? Explain briefly.

a) Who is right, or are they both right, or are neither of them right? Explain briefly. b) Which way sounds easier to you? Explain briefly.

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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hi please 15a, and 15b
Short Answer Answer each question with a few clear, concise sentences. 15. The weather forecast says that there is a 10% chance to rain each day for the next week (7 days). Amy and Bob are wondering what the probability is that it will rain at least once during the week. Bob says, "To calculate this probability, we have to find the probability that it will rain exactly once, exactly twice, exactly three times, etc. and then add them all up. In other words, we should use the binomial formula with n = 7, p = 0.10, and x = 1, then x = 2, then x = 3, then x = 4, then x = 5, then x = 6, and then finally x = 7, and add up all the answers." Amy says, “I have a better idea. Let's calculate the probability that it won't rain at all and use that answer. So use the binomial formula with n = 7, p = 0.90, and x = 0. Whatever that answer is, do 100% minus that answer and that is the probability it will rain at least once." a) Who is right, or are they both right, or are neither of them right? Explain briefly. b) Which way sounds easier to you? Explain briefly.
Transcribed Image Text:Short Answer Answer each question with a few clear, concise sentences. 15. The weather forecast says that there is a 10% chance to rain each day for the next week (7 days). Amy and Bob are wondering what the probability is that it will rain at least once during the week. Bob says, "To calculate this probability, we have to find the probability that it will rain exactly once, exactly twice, exactly three times, etc. and then add them all up. In other words, we should use the binomial formula with n = 7, p = 0.10, and x = 1, then x = 2, then x = 3, then x = 4, then x = 5, then x = 6, and then finally x = 7, and add up all the answers." Amy says, “I have a better idea. Let's calculate the probability that it won't rain at all and use that answer. So use the binomial formula with n = 7, p = 0.90, and x = 0. Whatever that answer is, do 100% minus that answer and that is the probability it will rain at least once." a) Who is right, or are they both right, or are neither of them right? Explain briefly. b) Which way sounds easier to you? Explain briefly.
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