Question

The sum of weight of students of class is 1480kg. If the average weight of boys and girls are respectively 50kg and 40 kg then the what is the possible number of girls and boys

Answer 1

Total weight/weight of boys and girls.

that is, 1480/90=16.444

16.44 average of boys and girls.

That can be most probably 16

or it can be 17.

Answer 2

Answer:

30

Step-by-step explanation:

Given that:

The weight of students of class = 1480 kg

Let the number of boys = x

The number of girls = y

Given, The average weight of boys = 50 kg

The average weight of girls = 40 kg

Also,  

$Average=\frac {Sum\ of\ observations}{Number\ of\ observations}$

Thus,  

50 x = Sum of the weight of boys

40 y = Sum of the weight of girls

Sum of the weight of boys + Sum of the weight of girls = 50 x + 40 y = 1480

Thus,

50 x + 40 y = 1480

Possible values x = 28 , y = 2

Total possible numbers = 30

(Answer varies)