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The probability a student passes the 1st Math exam is 70%. If the student passes the 1st exam, the probability they pass the 2nd exam

The probability a student passes the 1st Math exam is 70%. If the student passes the 1st exam, the probability they pass the 2nd exam is 80%. If the student fails the 1st exam, the probability they pass the 2nd exam is 60%. Use a probability tree to answer each of the following questions A). Find the total probability the student passes the 2nd exam. Answer as a percent to one decimal. B). The students passes the 2nd exam. What is the probability they passed the 1st exam? Answer as a percent to one decimal

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