Question: The period of time a certain model of DVD player lasts before it breaks is normally distributed with mean 5.2 and standard deviation of 1.3 years.

A. Find the probability that a randomly selected DVD will have a breakdown 3 years.

B. If this company sold 150,000 of these DVD players, how many would they expect to get back if they offer a 2 year warranty?

C. The company randomly selects 100 DVD's for testing. Is it a likely event that the mean lifetime of the DVD's will be greater than 5.7 years? Why or why not?