Question

Seats of IT, mechanical and civil in a college are in ratio 4 : 4 : 5. If it is decided to increase the seats by 20%, 50% and 20% respectively in these branches what will be the ratio of increased seats.
1. 4 : 4 : 5
2. 4 : 3 : 7
3. 4 : 5 : 5
4. 5 : 6 : 9
5. 3 : 6 : 7

Answer 1

Correct Answer - Option 3 : 4 : 5 : 5

Given:

Seats of IT, mechanical and civil in a college are in ratio 4 : 4 : 5

Calculation:

Let the seats of IT, mechanical and civil be 4x, 4x and 5x

After increment seats of IT will be = 4x × 120/100 = 4.8x

After increment seats of Mechanical will be = 4x × 150/100 = 6x

After increment seats of civil will be = 5x × 120/100 = 6x

⇒ required ratio = 4.8x : 6x : 6x

⇒ After solving ratio = 4 : 5 : 5