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:

1.

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:

[A].	5 15/17 % loss
[B].	5 15/17 % gain
[C].	6 2/3 % gain
[D].	None of these

Answer: Option B

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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