Question

A shopkeeper earns a profit of RS. 1 by selling a pencil and a loss of 20 Paisa by selling a eraser.1.In a given day he had a loss of RS 10.On this day, he sold 35 pencils .How many erasers were sold on this day. With explaination​

Answer 1

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I) let no.of.eraser sold be X

Total loss=Rs.10

10=Loss by eraser - profit by pencil

10=(0.10x)-(35×1)

10=0.10x-35

10+35=0.10x

45=0.10x

45/0.10=X

450=X

X=450

so 450 erasers were sold that day..

ii)Let no.of.pencil be Y

Total profit=Rs.25

profit by pencil - loss of eraser

25=(1 × y)-(100×0.10)

25=y-10

25+10=y

35=y

y=35

so 35 pencils were sold that day..

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Answer 2

Step-by-step explanation:

let no. of eraser sold be x

total loss = rs 10

10= loss by eraser - profit by pencil

10= (0.10x) - (35×1)

10= 0.10x -35

45=0.10x

x=450

so 450 erasers were sold that day

(ii) let no. of pencil be y

total profit = rs 25

25= profit by pencil - loss by eraser

25=( 1× y) - (100× 0.10)

25=y-10

35=y

so 35 pencils were sold that day