Question 5.410

66. Acceptance Sampling. A shipment of 25 personal digital assistants (PDAs) contains 3 that are defective.

A quality control specialist inspects 2 of the 25 PDAs. If both are defective, then the shipment is rejected.

  1. Explain whether a permutation or a combination is being used.
  2. Find the number of ways that both PDAs will be defective.
  3. Find the probability of rejecting the shipment.