Question: Leon knows that his first four test grades were 86, 95, 98, and 88. Use the formula x = x1 + x2 + ...+Xn 2

Leon knows that his first four test grades were 86, 95, 98, and 88. Use the formula x = x1 + x2 + ...+Xn 2 + win to find Leon's grade on the fifth test if his test average is 90.2.

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