Multiple choice

In objective test a correct ans score 4 marks and on a wrong ans 2 marks are ---. a student score 480 marks from 150 question. how many ans were correct?

  1. 120

  2. 130

  3. 110

  4. 150
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let c be correct answers. Total marks = 4c - 2(150-c) = 480. Solving: 4c - 300 + 2c = 480 → 6c = 780 → c = 130. 130 correct × 4 = 520, 20 wrong × (-2) = -40, net = 480.

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