Question

There are 40 girls in a class. Smitha who weights 50 Kgs , Leaves the class. A new girl Rashmi comes and increases the average weight by the class 1/4 . find the weight of Rashmi

Answer 1

I think The Question is incomplete. The initial value for average is not given in the question so it is not possible to get any numerical value of the answer.

Answer 2

Answer:

The weight of Rashmi is 60 kg.

Step-by-step explanation:

Let the weight of Rashmi be x.

The total number of students is 40.

It is given that Smitha who weights 50 Kgs , Leaves the class. A new girl Rashmi comes and increases the average weight by the class $\frac{1}{4}$.

Mean formula

$mean=\frac{\text{Sum of observation}}{\text{Total number of observations}}$

Let the initial average of the class is m.

$m=\frac{\text{Sum of observation}}{40}$

$40m=\text{Sum of observation}$

The new average is

$m+\frac{1}{4}=\frac{40m-50+x}{40}$

$40m+10=40m-50+x$

$x=60$

Therefore the weight of Rashmi is 60 kg.