Question

please tell solution for sum # 15 in the picture

Answer 1

The answer is a) 300

Let the no. of males be x and females be y

Then according to the first condition,

x/y = 3/2
⇒ 2x - 3y = 0 ...(1)

and according to the second condition,

x+50/y+80 = 5/4 
⇒ 4x - 5y = 200 ...(2)

Now, multiplying equation (1) by 2 we get
4x - 6y = 0 ...(3)

Subtracting equation (3) from (1) we get,
y = 200 

putting value of y in equation (1) we get
x = 300

Hence, option A) is correct