Find the weighted average.
-Michael gets test grades of 72, 77, 81, and 87. He gets a 96 on his final exam. Find the weighted mean if the tests each count for 10% and the final exam counts for 60% of the final grade. Round to one decimal place.
A) 247.8
B) -69.2
C) 89.3
D) 82.6

Question

Quizplus · Accepted Answer

The weighted mean is calculated by multiplying each grade by its weight, summing these products, and then dividing by the sum of the weights. For Michael's grades: (72*0.1) + (77*0.1) + (81*0.1) + (87*0.1) + (96*0.6) = 7.2 + 7.7 + 8.1 + 8.7 + 57.6 = 89.3.

Find the Weighted Average