Question

An instrument manufactured by a company consists of two parts A and B in manufacturing part A, 9 out of 100 are likely to be defective and in manufacturing part B, 5 out of 100 are likely to be defective. Calculate the probability that both the instruments will not be defective.

Options

• 0 .91

• 0.86

• 0.95

• 0.83

Answer 1

0.86
Explanation:

Given, part A is not defective P(A) = `91/100`

and part B is not defective, P(B) = `95/100`

∴ Required probability = P(A) x P(B)

= `91/100xx95/100` 

= 0.8645 = 0.86