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1. If a man were to sell his chair for Rs. 720, he would lose 25%. To gain 25% he should sell it for:

A. Rs. 1,200

B. Rs. 1,000

C. Rs. 960

D. Rs. 900

Solution:

Let the Cost price of the Chair is X.
SP = X - 25% of X
720 = 0.75X
X = 960
CP = Rs. 960
So, To gain 25%, SP would be
= 960 + 25% of 960 =Rs. 1200

Short-cut
CP of chair =

\frac{100}{75}

× 720 = Rs. 960
To gain 25%, SP =

\frac{125}{100}

× 960 = Rs. 1200

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