Elaine Gets Quiz Grades of 60, 86, and 78

Multiple Choice

Elaine gets quiz grades of 60, 86, and 78. She gets a 70 on her final exam. Find the weighted mean if the quizzes each count for 20% and the final exam counts for 40% of the final grade. Round to one decimal place.

A) 70.8
B) 72.3
C) 73.5
D) 72.8