Question

Your exam grade accounts for 70% of your quarterly grade. The average of all your homework grades accounts for 15% of your quarterly grade, and 15% of your quarterly grade is the average of all your pop quiz grades. This is 70% + 15% + 15% = 100%. homework 90, 0, 40, 95, 0, 10, 25, 48, 79, 83

pop quizzes 80, 20, 50, 98, 25, 0, 15, 60, 100

To the nearest whole number, what is your average grade for the 1st quarter of the school year where you score a 72 on your exam and your homework and pop quiz grades are as shown above. Select one:

a. 80

b. 87

c. 56

d. 65 e. 72

Answer 1

(d) 65

Explanation:

You want to know your average grade for the quarter given that exams, homework, and pop quiz grades are weighted 0.70, 0.15, 0.15, respectively. and the various grades are as listed.

Averages

The 9 homework grades have a total of 425, so an average of 47.2.

The 9 pop quiz grades have a total of 448, so an average of 49.8.

Overall

Then the quarterly grade is ...

0.70(72) +0.15(47.2) +0.15(49.8) ≈ 64.95 ≈ 65

Your average grade for the quarter is 65.

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