Question

The average weight of 6 boys gets increased by 5kg if a boy with weight 20kg is replaced by a new boy. What is the weight of new boy?

Answer 1

Answer:

50 kg

Step-by-step explanation:

let initially av.wt=x kg

on removing 20 kg and adding y kg it became x+5 kg

we can analyse that increase in total mass =5 ×6

=30 kg

then (y-20) kg =30kg

y=50 kg