Question
The average marks scored by 45 boys and 55 girls are 78 and 84 respectively. Find the average marks scored by all the students together. (Answer should be rounded off to the nearest integer)
Solution
ATQ, Required average = (45 X 78 + 55 X 84) ÷ (45 + 55) = (3,510 + 4,620) ÷ 100 = (8,130 / 100) ≈ 81
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