Question

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



PLZ ANSWER I WILL MARK AS BRAINLIEST

Answer 1

50Kg

Lets name the boys as a,b,c,d,e,f respectively. Now boy f weighs 20 kgs

a+b+c+d+e+f/6=average…..but we know f weighs 20kilos the sixxth boy weighs 20 kilos as given in the question.

So, a/6+b/6+c/6+d/6+e/6=average-f/6=average-20/6….1

Now the new average gets increased by 5 so

a/6+b/6+c/6+d/6+e/6+newboysweight/6=average+5

taking value of a/6+b/6+c/6+d/6+e/6 from 1

average-20/6+newboysweight/6=average+5 or

newboysweight/6=5+20/6

newboysweight=30+20=50kgs

Step-by-step explanation: