Multiple choice

The ratio of monthly income of A and B is 76 : 71. If income of A is increased by Rs. 500 and income of B is increased by Rs 625, then ratio becomes 20 : 19. What is the A's monthly income before increment?

  1. Rs. 7550

  2. Rs. 8200

  3. Rs. 8875

  4. Rs. 9500

  5. Rs. 9950
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let A's income be 76x and B's income be 71x. After increases: (76x + 500)/(71x + 625) = 20/19. Cross-multiply: 19(76x + 500) = 20(71x + 625). Solve: 1444x + 9500 = 1420x + 12500. 24x = 3000, so x = 125. A's income = 76 × 125 = Rs. 9500.

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