A math teacher gave her class two tests. 76% of the class passed the first test. 58% of the class passed both tests. What is the approximate probability that a student who passed the second test, given that he passed the first test.

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30 September, 14:46

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Juan Wilkins · Answer 1

P (test 2 | test 1) = P (test 2∩test 1) : P (test 1)

P (test 2 | test 1) = 0.58 : 0.76

P (test 2 | test 1) = 0.76 ≈ rounded to two decimal places