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Home > A2C > Chapter 13 > Lesson 13.1.2 > Problem 13-38

13-38.
  1. Three light bulbs are chosen at random from 15 bulbs, of which five are defective. What is the probability that: Homework Help ✎

    1. None of the three are defective.

    2. Exactly two are defective.

Exactly two are defective means that one is not defective.

Use the method from part (a).