It is known that 10% of the calculators shipped from a particular factory are defective. What is the probability that none in a random sample of four calculators is defective?
A) 0.0010
B) 0.2916
C) 0.3439
D) 0.6561

Question

Quizplus · Accepted Answer

The probability that a calculator is not defective is 1 - 0.1 = 0.9.

The probability that all four calculators in the sample are not defective is:

0.9 x 0.9 x 0.9 x 0.9 = 0.6561

Therefore, the answer is choice D.

It Is Known That 10% of the Calculators Shipped from a Particular