Question

. In each problem, make sure that you are clearly defining random variables, stating their distributions, and writing down the formulas that you are using. (That is, write down the pmf, write down mean and variance formulas.)

A company has 10 computers in its warehouse. Although all are new and still in boxes, four do not currently function properly. One of the company’s offices requests 5 computers, and the warehouse foreman selects 5 from the stock of 10 and ships them to the requesting office.

a. What is the probability that all five of the computers are not defective?

b. If it costs $80 to repair each computer, find the mean and variance of the distribution of the total repair cost.

c. If we are setting aside money to cover repair costs, how much do we need to be at least 95% sure that we’ll be able to cover the expenses? Use Chebyshev’s Inequality to calculate this amount.

Answer 1

Note:Due to insufficient time i couldn't solve c bit.If you want to answer for c bit please post it separately.Thank you.