Correct Answer: Rs 750
Explanation:
Let the sum of money be Rs y So Amount = y +[( y x 5 x 4 )/100] But Amount = Rs 900 ⇒ 900 = y +(20y)/100 ⇒ 900 = 6y / 5 ⇒ y = ( 900 x 5) /6 = Rs 750