(A) 20%
(B) 25%
(C) 30%
(D) 65%
Correct Answer is: A
Let sister’s weight be 100 kg.
Then brother’s weight = (100 + 25) kg = 125 kg
If brother’s weight is 125 kg, then sister’s weight is 100 kg.
If brother’s weight is 1 kg, then sister’s weight is 100/125 kg
If brother’s weight is 100 kg, then sister’s weight = (100/125 × 100) kg
Therefore, sister’s weight is 20 % less than that of brother