### Home > CCA2 > Chapter 12 > Lesson 12.1.2 > Problem 12-37

12-37.

Three light bulbs are chosen at random from 15 bulbs, of which five are defective. What is the probability that:

None of the three are defective. Homework Help ✎

Exactly two are defective.

Use combinations to solve this problem. For a review of combinations, see the Math Notes in Lesson 10.1.1.

Use the same method as part (a).