The average weight of 10 students is 50 kg. When the teacher joins them, the average becomes 52 kg. What is the teacher's weight?

A. 62 kg

B. 74 kg

C. 70 kg

D. 72 kg

Doubtly AI Asked 27 Oct 2026 AI-generated · not yet verified ssc cgl Save WhatsApp Report

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Answer: D. 72 kg

Answer: (D) 72 kg

Shortcut: teacher = new average + (number of old members × rise) = 52 + 10 × 2 = 72 kg.

Plain: 11 × 52 − 10 × 50 = 572 − 500 = 72 kg.

Doubtly AI · 27 Oct 2026 AI-generated · not yet verified Report

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