A shopkeeper sells a transistor at Rs. 840 at a gain of 20% and another for Rs. 960 at the loss of 4%. Find his total gain percent.
Choose one:
A) 5 12/17%
B) 5 13/17%
C) 5 14/17%
D) 5 15/17%
E) 5 16/17%
Explanation:   In this type of question, we will first find total C.P. of items, then total S.P. of items, then we will get gain or loss. From which we can easily calculate its percentage.   So lets solve it now.   So, C.P. of 1st transistor = (100/120∗840)=700   C.P. of 2nd transistor = (100/96∗960)=   1000Total C.P. = 1700   Total S.P. = 1800   Gain = 1800 - 1700= 
<gadget id="calculator">1800 - 1700</gadget>
<output>100</output>
100   Gain%= (100/1700∗100)=5 15/17%   Option 5 15/17%
<result>D</result>
A shopkeeper sells a transistor at Rs. 840 at a gain of 20% and another for Rs. 960 at the loss of 4%. Find his total gain percent.