The ratio of two number A and B is 7 : 5. If both numbers are increased by 3, then the ratio of A and B becomes 4 : 3. What is the sum of initial values of A and B?
Show answer & explanation
Correct answer: B
Explanation
Let A = 7x, B = 5x
According to the question,
(7x + 3) / (5x + 3) = 4 / 3
21x + 9 = 20x + 12
x = 3
A = 21, B = 15
Sum = 21 + 15 = 36