Multiple choice

A shopkeeper sold big, medium and small sized chairs for Rs. 650, Rs. 500 and Rs. 400, respectively. The total number of chairs sold was in the ratio 8 : 13 : 4. What is the average cost (in Rs.) of a chair?

  1. 506

  2. 546

  3. 478

  4. 532
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Average cost = Total cost / Total chairs. Total cost = (8 * 650) + (13 * 500) + (4 * 400) = 5200 + 6500 + 1600 = 13300. Total chairs = 8 + 13 + 4 = 25. Average = 13300 / 25 = 532.

AI explanation

Using the weighted average method, assume the quantities of big, medium, and small chairs sold are 8, 13, and 4. The total revenue is (8 × 650) + (13 × 500) + (4 × 400), which equals 5,200 + 6,500 + 1,600 = 13,300. The total number of chairs is 8 + 13 + 4 = 25, so the average cost per chair is 13,300 / 25 = 532.

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