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Probability and Conditional Probability

SAT Math· difficulty 4/5

Using problem 101's data, what is the probability that an unfit person eats a healthy diet?

  • A

    20/8020/80

  • B

    20/6520/65

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  • C

    20/4520/45

  • D

    20/15020/150

Explanation

Unfit total = 20+45=6520 + 45 = 65. P(healthy∣unfit)=20/65P(\text{healthy} | \text{unfit}) = 20/65.

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