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the university of Metropolis requires its students to pass an examination in college-level mathematics before they can graduate.

the university of Metropolis requires its students to pass an examination in college-level mathematics before they can graduate. The students are given three chances to pass the exam; 61 % pass it on their first attempt, 68% of those that take it a second time pass it then, and 44% of those that take it a third time pass it then. What percent of the students are allowed to graduate because of their performance on the exam?
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