Question

EASY QUESTION PLEASE HELP!!

In a city school, 60% of students have math class, 55% have science class, and 35% have math and science class this semester. What is the probability (rounded to the nearest whole percent) that a randomly selected student will have science class this semester, given that the student is in math class?
58%
20%
80%
64%

Answer 1

58%

Explanation:

Out of 60 students who take math, 35 of them will also have science. The desired probability is ...

35/60 = 0.58333... ≈ 58%

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More formally, ...

P(S | M) = P(S&M)/P(M)

= 35%/60% = 7/12 ≈ 58%