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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? -

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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

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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