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A physics student want to calculate her final grade. The grade distribution is tests = 30%, quizzes = 15%, homework=10%, labs=25%, and the final exam= 20%. Calculate her final grade if she got the following averages for each category: Tests=80%; Quizzes=70%; Homework=80%; Labs=90%; Final exam=90%.

Sagot :

Given:

The grade distribution is tests = 30%, quizzes = 15%, homework=10%, labs=25%, and the final exam= 20%.

Averages for each category: Tests=80%; Quizzes=70%; Homework=80%; Labs=90%; Final exam=90%.

Required:

We need to find the final grade.

Explanation:

Let the total mark for each is 100,

The mark for the test is 80.

We need to find 30% of 80.

[tex]grade\text{ for test =}\frac{30}{100}\times80=24[/tex]

The mark for the quizzes is 70.

We need to find 15% of 70.

[tex]grade\text{ for quizzes =}\frac{15}{100}\times70=10.5[/tex]

The mark for the homework is 80.

We need to find 10% of 80.

[tex]grade\text{ for homework =}\frac{10}{100}\times80=8[/tex]

The mark for the labs is 90.

We need to find 25% of 90.

[tex]grade\text{ for labs =}\frac{25}{100}\times90=22.5[/tex]

The mark for the final exam is 90.

We need to find 20% of 90.

[tex]grade\text{ for final exam=}\frac{20}{100}\times90=18[/tex]

Add grade values for all the categories.

[tex]Final\text{ grade =24+10.5+8+22.5+18}[/tex]

The final grade was 83 out of 100.

Divide 83 by 10.

The final grade is 8.3 out of 10.

Final answer:

[tex]Final\text{ grade =83 out of 100}[/tex][tex]Final\text{ grade =8.3 out of 10}[/tex]