The average weight of 20 teachers is 80 kg

Asked by admin @ 11/08/2021 in Math viewed by 7519 People

avg age of 20 teachers is 80 kg if the weight of the principal included the average decreases by 1 kg what is the weight of principal

Answered by admin @ 11/08/2021

Solution:-

Given, The average weight of 20 teachers is 80kg

The weight of 20 teachers = 20×80 = 1600kg

As given that, principal was included

It decreases by 1 kg in average weight

So, The average weight of 21 teachers is 79kg

The weight of 21 teachers = 79×21 = 1659 kg

Now, Old average weight of teachers is 80kg

New average weight of teachers is 1659 kg

So, The weight of the principal = Old Average weight - New average weight = 1659-1600kg = 59kg.

Hence, Proved

Hope you understand

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