SOLUTION: A class of 10 students has an average score of 95. Another class of 15 students has an average score of 80. What is the weighted average? A) 83 B) 86 C) 87.5 D) 88 E) 90

Question 252672: A class of 10 students has an average score of 95. Another class of 15 students has an average score of 80. What is the weighted average?
A) 83 B) 86 C) 87.5 D) 88 E) 90
Answer by palanisamy(496) (Show Source): You can put this solution on YOUR website!
A class of 10 students has an average score of 95.
Total marks = 10*95 = 950
Another class of 15 students has an average score of 80.
Total marks = 15*80 = 1200
Total number of students in both classes = 10+15 = 25
Total marks obtained by the students in both classes = 950+1200 = 2150
Weighted average of all the students = 2150/25
= 86

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