The Readylite Company produces a flashlight which is perfectly reliable except for two components: the battery,which has a random failure rate of one in every five hours of operation; and the light bulb,which has a random failure rate of three in every ten hours.What is the probability that the battery will perform reliably for one hour?
A)0.2
B)0.3
C)0.5
D)0.7
E)0.8

Question

Quizplus · Accepted Answer

The probability that the battery will perform reliably for one hour is 1 minus the failure rate, which is 1 - 0.2 = 0.8.

The Readylite Company Produces a Flashlight Which Is Perfectly Reliable