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butalik [34]
3 years ago
6

4) Elaine gets quiz grades of 90, 83, and 64. She gets a 69 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
Mathematics
1 answer:
Natasha2012 [34]3 years ago
6 0

The weighted mean if the quizzes each count for 20% and the final exam counts for 40% of the final grade rounded to one decimal place is <u>18.8</u>

Mean is the average set of numbers.

Given the Elaine quiz grades to be 90, 83 and 64

40% of the final grade will be expressed as:

20% of 90 = 18

20% of 83 = 16.6

20% of 64 = 12.8

If the quiz count for 40% of the final grade, then her final grade will be:

40% of 69 = 27.6

Take the weighted mean

Mean = Sum of scores/Sample size

Mean = (18+16.6+12.8+27.6)/4

Mean = 75/5

Mean = 18.75

Hence the weighted mean if the quizzes each count for 20% and the final exam counts for 40% of the final grade rounded to one decimal place is 18.8

Learn more here: brainly.com/question/23035749

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