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Out of 120 students, 80 are from Econ major. Among them, 20 are double major with Math. What is the probability that someone is a

Out of 120 students, 80 are from Econ major. Among them, 20 are double major with Math. What is the probability that someone is a double major given they are already econ major? (5) A)1/2 B)3/5 C)1/4 D)5/9

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