Recently, an estate agent received complaints about the condition of several houses that he sold. The estate agent conducted an analysis and found that 5% of all houses that he sold are not in good condition after 2 years. A sample of 20 houses that he sold is selected at random. Let X be the number of houses in this sample which are not in good condition after 2 years. (i) Find the mean and standard deviation for this distribution. (ii) Calculate the probability that exactly 3 houses are not in good condition after 2 years.

Recently, an estate agent received complaints about the condition of several houses that he sold. The estate agent conducted an analysis and found that 5% of all houses that he sold are not in good condition after 2 years. A sample of 20 houses that he sold is selected at random. Let X be the number of houses in this sample which are not in good condition after 2 years. (i) Find the mean and standard deviation for this distribution. (ii) Calculate the probability that exactly 3 houses are not in good condition after 2 years.

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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