By selling 90 pens for Rs. 80,a man loses 20% | vedclass

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(D) Let the cost price $(C.P.)$ of $90$ pens be $x$.Given that selling $90$ pens for $Rs. 80$ results in a loss of $20\%$.Therefore,$80\%$ of $C.P. =

Vedclass · Accepted Answer

$120$

Vedclass · Answer

(D) Let the cost price $(C.P.)$ of $90$ pens be $x$.Given that selling $90$ pens for $Rs. 80$ results in a loss of $20\%$.Therefore,$80\%$ of $C.P. = 80$.$0.80 	imes x = 80 \implies x = 100$.So,the cost price of $90$ pens is $Rs. 100$.To gain a profit of $20\%$,the selling price $(S.P.)$ should be $120\%$ of the $C.P.$$S.P. = 1.20 	imes 100 = 120$.Thus,the selling price of $90$ pens for $20\%$ profit is $Rs. 120$.

By selling $90$ pens for $Rs. 80$,a man loses $20\%$. What should be the selling price (in $Rs.$) of $90$ pens for $20\%$ profit?

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