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In Brianna’s school, grades are calculated as follows: 60% from tests, 25% from homework, and 15% from in-class assignments. (Grades can be considered as expected values of a continuous random variable, but not necessarily normally distributed.) If Brianna’s test total is 84 out of 100, her homework score is 91 out of 100, and her in-class grade is 75 out of 100, what is her grade average? Enter your answer up to one decimal place.

Respuesta :

Using the weighed mean, it is found that her grade average is of 84.4.

Weighed mean:

  • To find the weighed average, we multiply each grade by it's weight.

In this problem, the grades and the weights are as follows:

  • Grade of 84 with a weight of 0.6.
  • Grade of 91 with a weight of 0.25.
  • Grade of 75 with a weight of 0.15.

Hence:

[tex]M = 84(0.6) + 91(0.25) + 75(0.15) = 84.4[/tex]

Her grade average is of 84.4.

To learn more about weighed mean, you can take a look at https://brainly.com/question/24398353

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