An instructor determines a students weighted average from qu

An instructor determines a student\'s weighted average from quizzes, tests and a final. Each test counts as two quizzes, and the final counts as six quizzes. Ashley has quiz scores of 98, 92, 89, 97, 100, and 95. Her test scores are 99, 95, and 98. Her final score is 91. Find her weighted mean for the course

Solution

Ashley quiz score are: 98, 92, 89, 97, 100, and 95

Mean of quiz score = 95.1667

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Test scores : 99,95,98

Mean = 97.3333

Final score = 91

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Weight x score we calculate to find weighted average

Weighted sum = 6(91) +2(97.3333)+95.1667

= 835.8333

Sum of weights = 9

Hence weighted average = 835.8333/9

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