After a deduction of 5% from a certain sum and 10% from the remainder, a sum of Rs 171 is left. The original sum was- ( The options are given below)

Question

A) Rs 50

B) Rs 40

C) Rs 30

D) Rs 15

Comments

Please explain it.

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your options are wrong

Answer 1

Let   the   Original sum is   Rs x 

So   according   to   the   question ,   

After   5%   of   deduction   we   get ,   x - 5x/100 = 19x/20 and  

again   10 %   deduction   we   get ,   

19x/20 - 19x/20 x 10/100

= 19x/20 - 19x/200

= (190x-19x)/200

= 171x/200

and   it   is   given   as ,   171x/200 = 171 

So   x   =  200

So, The original sum was Rs 200