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1. A man buys a chair and table for Rs. 6000. He sells the chair at a loss of 10% and the table at gain of 10%. He still gains Rs. 100 on the whole. Cost price of chair is:

A. Rs. 2500

B. Rs. 2850

C. Rs. 3050

D. Rs. 3500

Solution:

If the CP of the chair be Rs. x then,
Total SP =

\frac{x \times 90}{100}

((6000 - x) \times \frac{110}{100})

Or, 9x + 66000 - 11x = 61000
Or, 2x = 66000 - 61000 = 5000
Or, x = Rs. 2500

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