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Question
Average weight of 25 boys in a class is 48 kgs. The average weight of the class of 40 students is 45 kgs. What is the average weight of the 15 girls in the class?
Options
44 kgs
42 kgs
40 kgs
39 kgs
MCQ
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Solution
40 kgs
Explanation:
Total weight of 15 girls = (45 × 40 – 25 × 48) kg
= (1800 – 1200) kg
= 600 kg
∴ Required average weight = `600/15` = 40 kg.
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