Tuesday, November 8, 2011

Confusing word Problem. Help Please!!!?

A student must have an average on five tests that is greater than or equal to 80% but less than 90% to receive a final grade of B. Devon's grades on the first 4 tests were 78, 63,93 and 78 . what range of grades on the 5 th rest would give a B in this course?

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