Correct Answer - Option 4 : 170
Given:
The ratio of two numbers is 12: 5. If each number is increases by 20 then their ratio becomes 24: 12
Calculation
Let number is 12x and 5x
According to question,
(12x + 20) ÷ (5x + 20) = 24 ÷ 12
144x + 240 = 120x + 480
24 x = 240
X = 10
Then number 12 × 10 = 120 and 5 × 10 = 50
Sum of the number = 120 + 50 = 170
Hence, sum of the number = 170