1. In a large population, 10% of individuals have certain disease. If 20 individuals are selected randomly,

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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1. In a large population, 10% of individuals have certain disease. If 20 individuals are selected randomly,
(a) what is the probability that exactly 5 individuals have the disease?
(b) what is the probability that not more than 5 have the disease? The probability that at least 2 do?
(c) Find the expected number of people that have the disease.
Transcribed Image Text:1. In a large population, 10% of individuals have certain disease. If 20 individuals are selected randomly, (a) what is the probability that exactly 5 individuals have the disease? (b) what is the probability that not more than 5 have the disease? The probability that at least 2 do? (c) Find the expected number of people that have the disease.
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