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The Mean Weight Of A Class Of 35 Students Is 45 Kg. If The Weight Of The Teacher Be Included, The Mean Weight Increases By 500 G. Find The Weight Of The Teacher?

Answer»

MEAN WEIGHT of 35 students = 45 KG.

Total weight of 35 students = (45 × 35) kg = 1575 kg.

Mean weight of 35 students and the teacher (45 + 0.5) kg = 45.5 kg. 

Total weight of 35 students and the teacher = (45.5 × 36) kg = 1638 kg. 

Weight of the teacher = (1638 - 1575) kg = 63 kg.

Hence, the weight of the teacher is 63 kg.

Mean weight of 35 students = 45 kg.

Total weight of 35 students = (45 × 35) kg = 1575 kg.

Mean weight of 35 students and the teacher (45 + 0.5) kg = 45.5 kg. 

Total weight of 35 students and the teacher = (45.5 × 36) kg = 1638 kg. 

Weight of the teacher = (1638 - 1575) kg = 63 kg.

Hence, the weight of the teacher is 63 kg.



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