A man gives 50% of his money to his son and 30% to his daughter.

A man gives 50% of his money to his son and 30% to his daughter. 80% of the rest is donated to a trust. If he is left with Rs. 16,000 now, how much money did he have in the beginning?

Amount with man in the beginning = Rs. x (let).
Amount given to son and daughter = 80%.
Remaining amount

= 20% of x = Rs.	x
	5

Remaining amount after donations to trust

=	x	×	20	= Rs.	x
	5		100		25

∴	x	= 16000
	25

⇒ x = 16000 × 25 = Rs. 400000