Question
A shopkeeper sells one transistor for Rs. 840 at a gain of 20% and another for Rs. 960 at a loss of 4%. His total gain or loss percent is:
Answer: Option B
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C.P. of 1st transistor = Rs. \(\left(\frac{100}{120}\times840\right)\) = Rs. 700.
C.P. of 2nd transistor = Rs. \(\left(\frac{100}{96}\times960\right)\) = Rs. 1000
So, total C.P. = Rs. (700 + 1000) = Rs. 1700.
Total S.P. = Rs. (840 + 960) = Rs. 1800.
So, Gain % = \(\left(\frac{100}{1700}\times100\right)\) % = \(5\frac{15}{17}\) %
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