Question

The mean weight of 6 children is 35 kg.when a new boy joined the group, the mean weight becomes 36 kg .What is the weight of the new boy

Answer 1

this is the answer...........

Answer 2

EXPLAINATION
mean=total weight/number of students

Let total weight = x

35=x/6
35*6=x
210=x

Therefore, x=210 kg



Let weight of mew boy = y
210+y/7=36(since a new boy joins total no. of students is7)

210+y=36*7
210+y=252
y=252-210
Y=42kg


Hence weight of new boy = 42kg






(/=division
*=multiplication)




Hope it’s helpful