Elaine gets quiz grades of 71, 75, and 64. She gets a 60 on her final exam. Find the weighted mean if the quizzes each count for
2 answers:
Answer
Find out the weighted mean .
To prove
As given
Elaine gets quiz grades of 71, 75, and 64.
She gets a 60 on her final exam
if the quizzes each count for 20% and the final exam counts for 40% of the final grade.
20 % is written in the decimal form
= 0.20
40 % is written in the decimal form
= 0.40
20% of 71 = 0.20 × 71
= 14.2
20% of 75 = 0.20 × 75
= 15
20% of 64 = 0.20 × 64
= 12.8
40% of 60 = 0.40 × 60
= 24
Thus
Weighted mean = 14.2 + 15 + 12.8 + 24
= 66
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