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Back to 3.3 Two Basic Rules of Probability

3.3 Exercise 22

Avg difficulty 2.5

A student goes to the library. Let events B = the student checks out a book and D = the student checks out a DVD. Suppose that P(B) = .40, P(D) = .30, and P(D|B) = .5.

  1. Find P(B′).
  2. Find P(D AND B).
  3. Find P(B|D).
  4. Find P(D AND B′).
  5. Find P(D|B′).

OpenStax Statistics, 3.3 Two Basic Rules of Probability, exercise 22

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