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A student must have a average (the mean) 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 his first four tests were 80%, 62%, 93% nad 76%. What range of grades on the fifth test would give him a B in the course? (Assume that 100% is the highest grade possible)

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A student must have a average (the mean) on five tests that is greater than or equal to 80% but less than 90% to receive
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Preview: ... first four tests were 80%, 62%, 93% nad 76%. What range of grades on the fifth test would give him a B in the course? (Assume that 100% is the highest grade poss ...

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