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2016-01-04T12:51:36+05:30

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In first case,
s.p. = 3120
loss percent = 4%
c.p.=x
x -(4%*x)=3120
100x-4x/100 = 3120
96x/100= 3120 x = 3120*100/96 = 3250 c.p. = 3250 in second case, s.p.=3640 c.p. = 3250 profit = 3640-3250 = 390 profit % = profit /c.p.*100 = 390/3250*100 = 12%
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