60% of total donation required by school was collected when 50% of the parents donated an average of ₹ 1200. Find the average amount that should be donated by rest 50% parents so that school has the whole amount that was required.

  1. A. 1000
  2. B. 2000
  3. C. 800 ✓
  4. D. 500

Correct Answer: C. 800

Explanation

Let 50\% of parents be x. Amount collected = 1200x, which is 60\% of total required. Total required = \frac{1200x}{0.60} = 2000x. Remaining amount needed = 800x. Average for remaining x parents = \frac{800x}{x} = 800.

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