Conditional Probability

AP Statistics· difficulty 3/5

A two-way table classifies 100 items by row (X/Y) and column (A/B).

A B X Y 15 25 35 25

What is P(A | Y)?

  • A

    35/50

  • B

    15/40

  • C

    35/60

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  • D

    35/100

Explanation

Row Y total = 35 + 25 = 60. P(A | Y) = 35/60.

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