APTITUDE

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H.C.F and L.C.M
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True Discount
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Oddmanout and Series
Data Interpretation
probability
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PROFIT AND LOSS
Important Facts: Cost Price:The price at which an article is purchased , is called its cost price,abbreviated as C.P. Selling Price:The price at which an article is sold , is called its selling price,abbreviated as S.P. Profit or Gain:If S.P. Is greater than C.P. The seller is said to have a profit or gain. Loss:if S.P. Is less than C.P., the seller is said to have incurred a loss.
FORMULAE
1.Gain=(S.P-C.P) 2.Loss=(C.P-S.P) 3.Loss or Gain is always reckoned on C.P. 4.Gain%=(gain*100)/C.P 5.Loss%=(loss*100)/C.P 6.S.P=[(100+gain%)/100]*C.P 7.S.P=[(100-loss%)/100]*C.P 8.C.P=(100*S.P)/(100+gain%) 9.C.P=(100*S.P)/(100-loss%) 10.If an article is sold at a gain of say,35%,then S.P=135% of C.P. 11.If an article is sold at a loss of say,35%,then S.P=65% of C.P. 12.When a person sells two similar items, one at a gain of say,x%,and the other at a loss of x%,then the seller always incurs a loss given by Loss%=[common loss and gain %/10]2=(x/10)2 13.If a trader professes to sell his goods at cost price,but uses false weight,then Gain%=[(error/(true value-error))*100]% 14.Net selling price=Marked price-Discount
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