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16 April, 11:14

Suppose is a semester that 38% of students at a college failed mathematics, 27% failed physics, and

9% failed both. A student is selected at random.

a) If a student failed physics, what is the probability that he or she failed math?

b) If a student failed math, what is the probability he or she failed physics?

c) What is the probability that he or she failed math or physics?

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  1. 16 April, 11:42
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    => 38% of students at a college failed mathematics

    => 27% failed physics, and=> 9% failed both. A student is selected at random.

    a) If a student failed physics, what is the probability that he or she failed math?

    => 1/38

    b) If a student failed math, what is the probability he or she failed physics?

    => 1/27

    c) What is the probability that he or she failed math or physics?

    => 1/9
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