Mathematics, 21.03.2021 05:10, bremarie102013

Fran Teck a math instructor, can greatest stack of final exams in five hours while Kay OSS, another math instructor, can grade the same set of tests in 2 hours. How fast can they grade the test papers if both work together?

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Fran Teck a math instructor, can greatest stack of final exams in five hours while Kay OSS, another...