A process is turning out end items that have defects of type A or type B or both. If the probability of type A defect is 0.1 and of a type B is 0.2, the probability that an end item will have no defect is

Question

Quizplus · Accepted Answer

The probability that an end item will have no defect is the complement of the probability that it will have a type A defect or a type B defect or both.

P(no defect) = 1 - P(type A defect) - P(type B defect) + P(type A defect and type B defect)
P(no defect) = 1 - 0.1 - 0.2 + (0.1 * 0.2)
P(no defect) = 0.72

Therefore, the best choice is C, with a probability of 0.72.

A Process Is Turning Out End Items That Have Defects