A shopkeeper sells one transistor for Rs. 840 at a gain of 20% and another for R

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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:
Options
A. 5 ¹⁵⁄₁₇ % loss
B. 5 ¹⁵⁄₁₇ % gain
C. 6 ²⁄₃ % gain
D. None of these

Correct Answer

5 ¹⁵⁄₁₇ % gain

Explanation

C.P. of 1^st transistor = Rs.	❨	100	x 840	❩	= Rs. 700.
		120

C.P. of 2^nd transistor = Rs.	❨	100	x 960	❩	= Rs. 1000
		96

So, total C.P. = Rs. (700 + 1000) = Rs. 1700.

Total S.P. = Rs. (840 + 960) = Rs. 1800.

∴ Gain % =	❨	100	x 100	❩%	= 5	15	%
		1700				17

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