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:	Pick.
A) 5 12/8 %	B) 5 15/12 %	C) 5 15/8 %	D) 6 12/17 %	E) 5 15/17 %
C.P. of 1st transistor = Rs.	(100/120 x 840 )= Rs. 700   C.P. of 2nd transistor = Rs.	(100/96 x 960)	= Rs. 1000   So, total C.P. = Rs. (700 + 1000) = Rs. 1700.   Total S.P. = Rs. (840 + 960) = Rs. 1800.   Gain % =	(100/1700 x 100)%=5 15/17 %   Answer: 5 15/17 %
<result>E</result>
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: