Two machines cost Rs. 3,000 in total. The first is sold at a 20% gain and the second at a 10% loss, giving an overall gain of 5%. What was the cost of the first machine?
Correct answer D. Rs. 1,500
Explanation
Let first cost a. Then 0.2a - 0.1(3,000 - a) = 0.05 × 3,000 = 150. So 0.3a = 450 and a = Rs. 1,500.
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