CAT 2022 Slot 1 Paper

Let the original number of students be ' n ' whose average weight is x
Let the number of students added be ' m ' and the average weight will be x+3
We need to find the value of n:m
It is given, average weight of students in a class increased by 0.6 after new students are added.
Therefore,

nx+m(x+3)

n+m

=x+0.6
nx+mx+3m=mx+nx+0.6n+0.6m
2.4m=0.6n
4m=n

n

m

=‌

4

1

The answer is option C