Kevin has the following averages in her

math class:

Homework Avg.: 88

Quiz Avg.: 84

Test Avg.: 92

Final Exam:?

If the teachers weights Homework at 20%

Quizzes at 25%, Tests at 40%, and the

Final Exam at 15%, what is the minimum

grade Kevin can make on the final exam so

that she scores a 90 in the class?

a. 90

c. 86

d. 94

b. 97

b. 97

Step-by-step explanation:

Home work = 88

20 % of 88 = 88 x 20/100 = 17.60

Quiz Average = 84

25 % of 88 = 84 x 25/100 = 21

Test Average = 92

40 % of 92 = 92 x 40/100 = 36.8

Add all = 17.60 + 21 + 36.8 = 75.40

Let the marks be x in final exam

The percentage is 15 % and scores a 90 in a class we can write

15x/100 + 75.40 = 90

0.15x = 90-75.40

0.15x = 14.60

x = 14.60/0.15 = 97

final exam marks will be 97