Question

Problem 94a

Answer 1

Given information

Use the following information to answer the next three exercises. The average lifetime of a certain new cell phone is three years. The manufacturer will replace any cell phone failing within two years of the date of purchase. The lifetime of these cell phones is known to follow an exponential

distribution.

Step-by-step explanation

Step 1.

It is deduced from the information given in the problem that the random variable is given by,

 

where

is the decay rate.