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: B
Cost Price of \(1st\) transistor \(= Rs. (\frac{100}{120} \times 840) = Rs. 700.\)
Cost Price of \(2nd\) transistor \(= Rs. (\frac{100}{96} \times 960) = Rs. 1000\)
So, total Cost Price \(= Rs. (700 + 1000) = Rs. 1700.\)
Total Selling Price \(= Rs. (840 +960) = Rs. 1800.\)
\(\therefore\) Gain % \(= (\frac{100}{1700} \times 100)\) % \(= 5\frac{15}{17}\) %