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A professor grades students on three tests, four quizzes, and a final examination. Each test counts as two quizzes and

the final examination counts as two tests. Sara has test scores of 65, 62, and 60. Sara's quiz scores are 61, 96, 80, and

89. Her final examination score is 65. Use the weighted mean formula to find Mara's average for the course. (Round

your answer to one decimal place. )

Respuesta :

Using the weighed mean formula, it is found that Mara's average for the course was of 68.6.

What is the weighed mean?

The weighed mean is given by the sum of all elements in a data-set multiplied by it's weight, divided by the sum of the weights.

In this problem, the weights are as follows:

  • A quiz has a weight of 1.
  • A test has a weight of 2.
  • The final examination has a weight of 4.

Hence, her weighed mean is given as follows:

[tex]M = \frac{2(65 + 62 + 60) + (61 + 96 + 80 + 89) + 4(65)}{6 + 4 + 4} = 68.6[/tex]

Mara's average for the course was of 68.6.

More can be learned about the weighed mean formula at https://brainly.com/question/24398353

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