Question

The students in three casses are in the ratic 2:3:5. If 40 students are increased in each class, he ratio changes to 4:5:7. Originally, the total number of students was

Answer 1

initially; 2:3:5

after

increse; 4:5:7

look at 2 & 4; there is diff of 2 similarly in 3& 5;

5 &7

& this diff 2 unit=40

1unit= 20

2:3:5=10 unit

10*20=200