The average cost of 20 items is Rs.1,600. Out of these the average cost of 10 small items is Rs.1,850 and that of 6 medium items Rs.1,550. Find the average cost of the remaining large items.
Question and options
The average cost of 20 items is Rs.1,600. Out of these the average cost of 10 small items is Rs.1,850 and that of 6 medium items Rs.1,550. Find the average cost of the remaining large items.
- 1,050
- 2,050
- 5,010
- 3,010
Answer and explanation
Correct answer: A - 1,050
Total = 20 x 1600 = 32000. Small = 10 x 1850 = 18500, medium = 6 x 1550 = 9300. Remaining 4 large items cost 32000 - 27800 = 4200, average 4200 / 4 = 1050.
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