Multiple choice

The ratio of earning of A, B, C is 5 : 8 : 13. If the earning of A is increase by 20%, earning of B also increased by some percent and earning of C is decreased by 40% then sum of earning of A, B, C remains same as before. If the difference of initial earning and increased earning of B is Rs. 3360. What was the sum of earning of A, B, C together? A,B, C की आय का अनुपात 5: 8: 13 है। यदि A की आय 20% बढ़ जाती है, B की आय में भी कुछ प्रतिशत की वृद्धि हुई है और C की आय 40% कम हो जाती है तो A,B, C की आय का योग पहले की तरह ही रहता है। यदि B की प्रारंभिक आय और बढ़ी हुई आय अंतर 3360 रूपये है, तो प्रारंभ में A,B, C की आय का योग क्या था ।

  1. Rs. 3360

  2. Rs. 22800

  3. Rs. 20020

  4. Rs. 20800

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let initial earnings be 5x, 8x, 13x (sum = 26x). After changes: A = 6x (+20%), C = 7.8x (-40%). For total to remain 26x, B must earn 12.2x. Difference: 12.2x - 8x = 4.2x = Rs. 3360, so x = 800. Initial sum = 26x = 26 × 800 = Rs. 20800. Options A, B, and C are incorrect.