Question

a man buys two pens at rupees 20 each he sells one at a gain of 5% and other at a loss of 5% find his gain or loss percent​

Answer 1

Explanation:

sp of 1st pen=20

a gain of 5%

so

$cp = \frac{100 \times 20}{105} \\ cp = \frac{400}{21 } \\ cp = 19.04$

$sp \: of \: 2nd \: pen = 20 \\ loss \: of \: 5 \\ so \\ cp = \frac{100 \times 20}{95} \\ cp = \frac{400}{19 } \\ cp = 21.05$

sum of both cp=19.04+21.05

=40.09

so cost of two pen=2*20=40

it clearly we have been loss

so loss= 40.09-40

0.09

loss%= 0.09*100/40

0.225%

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