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Part ACSIR NET December 2025search-every-difficulty-split-not-just-the-first-one-found

Search every difficulty split not just the first one found

In an exam, questions of three difficulty levels — hard, medium, and easy — fetch respectively 7, 3, and 2 marks if correct and 0 if incorrect. Three students got 30 marks each but in three different ways, though the total number of questions correctly answered by each student was the same. Then what could be the total number of questions correctly answered by each of these students?

  1. A.12
  2. B.10✓
  3. C.9
  4. D.6

You have the answer. Trap Analysis is why the other three were written.

Not a worked solution repeated four times — the specific reasoning error each wrong option was built to reward.

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