Question:By selling toffees at 20 for a taka, a man loses 4 %. To gain 20 % for 1 taka, he must sell 

A 16 toffees 
B 20 toffees 
C 24 toffees 
D 25 toffees 

+ Answer
A 

+ Explanation
Let S.P of 20 toffees be tk x. 
then, 96 : 1 = 120 : x
or, x = `(120)/96`
= `5/4`
For taka `5/4`, toffees sold = 20
For taka 1, toffees sold = `(20 xx 4/5)` 
    =16

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Muhammad Abdullah Al Mamun

Editor, VCampus

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