Question

After a deduction of 5% from a certain
sum and then 10% from the remainder,
a sum of 171 is left. What was the
original sum?​

Answer 1

Answer:

let the sum be x

Step-by-step explanation:

so, x ×95/100=19x/20. {we did 95%bcoz 100%-deduction of 5%is 95%}

then,

19x/20 × 90/100=81x/200=171 (given)

x=171×200/81

=19×200/9=3800/9=422.22

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Answer 2

Step-by-step explanation:

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