Question

Having 10 members of group in this
group to 40kg wieght pesson went
to out side, and his place came to
new member so group of wight inverse 2kg,
so how much weight of new person?​

Answer 1

$\fontsize{18}{10}{\textup{\textbf{The weight of the new member is 60kg}}}$

Step-by-step explanation:

There are ten members, let the average weight be x

So total weight is 10x

40 kg member left, so new weight=10x-40

Let the weight of the new member be y

So, new total weight=10x-40+y

So the average becomes x+2

Therefore,

(10x-40+y)/10=x+2

10x-40+y=10x+20

=>y=20+40

=>y=60