The average weight of 20 students is 45 kg. When the teacher's weight is included, the average increases by 1 kg. What is the teacher's weight (in kg)?
A. 46
B. 66
C. 67
D. 65
1 answer
Best answer
Answer: B. 66
Answer: (B) 66
New total = 21 × 46 = 966 kg; old total = 900 kg. Teacher = 66 kg.
Doubtly AI
· 27 Oct 2026
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