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A stationery buys pens at 5 for Rs.28 and sells them at a profit of 25 %. How much should a customer pay; if he buys (i) only one pen ; (ii) three pens? - Mathematics

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Question

A stationery buys pens at 5 for Rs.28 and sells them at a profit of 25 %. How much should a customer pay; if he buys
(i) only one pen ;
(ii) three pens?

Sum
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Solution

For Stationery :

C.P. of 5 pens = Rs.28

C.P. of 1 pen =`28/5`Rs. = Rs.5.60

profit = 25%

∴ S.P. of 1 pen

`=((100+"Profit"%))/100xx"C.P. of 1 pen"`

`=((100+25))/100xx"Rs."5.60`

= Rs. `125/100xx5.60`

= Rs. `(125xx5.6)/100`= Rs. 5 × 1.4 = Rs.7

S.P. of 3 pens = 3 × 7 = Rs.21

∴ Customer pays for

(i) only one pen = Rs.7

(ii) Three pens = Rs.21

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Chapter 8: Profit, Loss and Discount - Exercise 8 (C) [Page 95]

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Selina Concise Mathematics [English] Class 8 ICSE
Chapter 8 Profit, Loss and Discount
Exercise 8 (C) | Q 1 | Page 95
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