CMAT 2014 Solved Question Paper

(b) Let the initial students in class be 2x, 3x and 4x
Now, when 40 is added in each class.
New, number of students will be 4y, 5y and 6y.
Now, according to the question
2x + 40 = 4y ..........(i)
3x + 40 = 5y .........(ii)
and 4x + 40 = 6y ......(iii)
∴ On solving above equations
2x = 40
∴x = 20
Hence, total number of students= 2x + 3x + 4x = 9x = 9 x 20 = 180 students