A recent survey found that 65 percent of high school students were currently enrolled in a math class, 43 percent were currently enrolled in a science class, and 13 percent were enrolled in both a math and a science class. Suppose a high school student who is enrolled in a math class is selected at random. What is the probability that the student is also enrolled in a science class?
The probability that a student is enrolled in science given that the student is enrolled in math is the proportion of math students who are also in science: 13% ÷ 65% = 0.20. Therefore, the probability is 0.20, choice C.
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