Conditional Probability

AP Statistics· difficulty 3/5

The two-way table summarizes survey responses by gender (M/F) and "Do you exercise daily?" (Yes/No).

Yes No M F 40 60 30 70

Given that a person is Male, what is the probability they exercise daily?

  • A

    0.20

  • B

    0.30

  • C

    0.40

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  • D

    0.57

Explanation

P(Yes | M) = 40/(40+60) = 40/100 = 0.40.

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