A person spent Rs. 50000 to purchase a desktop computer and a laptop computer. He sold the desktop at 20% profit and the laptop at 10% loss. If overall he made a 2% profit then the purchase price, in rupees, of the desktop is
Explanation:
Let the price of desktop be Rs. d, and laptop be Rs. (50,000 - d)
Total profit = 2% of 50,000 = Rs. 1,000
⇒ 1000 = 20% of d - 10% of (50000 - d)
⇒ 100000 = 20d - 500000 + 10d
⇒ 30d = 6,00,000
⇒ d = 20,000
Hence, 20000.
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