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
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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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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
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