Qstnid -C-1- A Stationer 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? (I) Only One Pen ; (Ii) Three Pens? (I) Only One Pen ; (Ii) Three Pens? (I) Only One Pen ; (Ii) Three Pens? - 08: Profit, Loss And Discount Class 8 Maths - Icse-viii-mathematics

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ICSE-VIII-Mathematics

08: Profit, Loss and Discount Class 8 Maths

with Solutions - page 4

Qstn# C-1 Prvs-Qstn Next-Qstn

#1
A stationer 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? (i) only one pen ; (ii) three pens? (i) only one pen ; (ii) three pens? (i) only one pen ; (ii) three pens?
Ans : For Stationer:
C.P. of 5 pens = Rs. 28
C.P. of 1 pen = Rs.28/5 = Rs. 5.60
Profit = 25%
∴ S.P. of 1 pen = (100 + Profit%)/100 × C.P. of 1 Pen
= (100 + 25)/100 × Rs. 5.60
= Rs. 125/100 × 5.60
= Rs. (125 × 5.6)/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 (i) only one pen = Rs. 7 (ii) Three pens = Rs. 21 (i) only one pen = Rs. 7 (ii) Three pens = Rs. 21 (i) only one pen = Rs. 7 (ii) Three pens = Rs. 21

#1-i
only one pen ;
Ans : only one pen = Rs. 7

#1-ii
three pens?
Ans : Three pens = Rs. 21