Question #7766

In a survey of 100 students, 15 students were taking algebra, biology and
chemistry, 25 were taking algebra and biology, 30 were taking algebra and
chemistry, 22 were taking biology and chemistry, 5 were only taking
algebra, 4 were only biology and 6 were taking only chemistry. If a student
is chosen at random, what is the probability of the students is taking
algebra, given that s/he is taking biology?

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