Mathematics, 21.08.2020 14:01 deidaraXneji

t takes one person 2 hours to grade 1 exam and it takes another 4 hours to grade 1 exam. If both work together, how many exams they can grades in 8 hours

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t takes one person 2 hours to grade 1 exam and it takes another 4 hours to grade 1 exam. If both wor...