17. According to the results of a recent survey, 10% of the teenagers in a city are habitual smokers. Now 20 teenagers are selected randomly and independently from the city.(b) Find the probability that exactly 18 teenagers in the sample are not habitual smokers. Teacher's Solution is:18 non-habitual smokers = 20 – 18 = 2 habitual smokers P(X = 2) = 20C2(0.1)2(0.9)18 = 0.2852Is the answer wrong? The probabiity that the soluion shows is exactly 2 teenagers in the sample are habitual smoker? But not the probabiity that exactly 18 teenagers in the sample are not habitual smoker?

Here Each trial is independent Here Finite number of trial There are two outcomes success and…

Answered: Find the probability that exactly 18…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Question

100%

17. According to the results of a recent survey, 10% of the teenagers in a city are habitual smokers. Now 20 teenagers are selected randomly and independently from the city.

(b) Find the probability that exactly 18 teenagers in the sample are not habitual smokers.
Teacher's Solution is:
1. 18 non-habitual smokers = 20 – 18 = 2 habitual smokers P(X = 2) = 20C2(0.1)2(0.9)18 = 0.2852
1. Is the answer wrong? The probabiity that the soluion shows is exactly 2 teenagers in the sample are habitual smoker? But not the probabiity that exactly 18 teenagers in the sample are not habitual smoker?