It is known that 10% of the calculators shipped from a particular factory are defective. What is the probability that at least one 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

We can solve this problem using the complement rule, which states that the probability of an event happening is equal to 1 minus the probability of the event not happening.

The probability that all four calculators are non-defective is (0.9)^4 = 0.6561.

Therefore, the probability that at least one calculator is defective is 1 - 0.6561 = 0.3439.

So the answer is C.

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