4 The life expectancy of a memory chip is 4 years a Find the

4. The life expectancy of a memory chip is 4 years. (a) Find the probability that a chip will last more than 5 years. Hint. This is exponential with A = 1/4. (b) If a second chip is used to replace the first when it fails, what is the probability you will still have a good chip after 5 years? Hint. This is a gamma distribution.

Solution

a) 0.2865

USE EXPODIST function in excel.

b) 0.9907