Use the at least once rule to find the indicated probability.
-In a batch of 8000 clock radios 3% are defective. A sample of 7 clock radios is randomly selected without replacement from the 8,000 and tested. The entire batch will be rejected if at least one of
Those tested is defective. What is the probability that the entire batch will be rejected?

Question

Quizplus · Accepted Answer

The probability that a clock radio is defective is 0.03. The probability that a clock radio is not defective is 0.97. The probability that all 7 clock radios are not defective is 0.97^7 = 0.808. The probability that at least one clock radio is defective is 1 - 0.808 = 0.192.

Use the at Least Once Rule to Find the Indicated