Question

Mean weight of class of 35 students is 45 kg. If the weight of the teacher is added then mean weight is increased by 500 gm.

Answer 1

Total weight of 35 students

= 35×47.5 kgs.

= 1662 5 kgs.

Total weight of 35 students + teacher =36×48 kgs.

= 1728 kgs

The weight of the teacher

= 1728 - 1662.5 = 65.5 kgs.

Answer 2

Given that : Mean weight of class of 35 students is 45 kg

Then, total weight of 35 students = 35×45 = 1575 kg

Also given that : If the weight of Teacher is added then mean weight is increased by 500gm.

Now, mean weight = 45 kg + (500gm= 0.5kg) = 45.5 kg

Then, total weight of class including teacher = 36×45.5 = 1638 kg

So, the weight of Teacher = 1638 - 1575 = 63 kg

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