Multiple choice general knowledge math & puzzles

Two students appeared at an examination. One of them secured 30 marks more than the other and his marks was 60% of the sum of their marks. The marks obtained by them are (Select the correct pair, the order is irrelevant):

  1. 60, 30

  2. 80, 50

  3. 90, 60

  4. None of these

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

Let marks be x and x+30. Higher score = 60% of sum, so x+30 = 0.60(2x+30). Solving: x+30 = 1.2x + 18, so 0.2x = 12, x = 60. The marks are 60 and 90.