Three friends P, Q and R were playing a game of cards. At the beginning of the game, P and Q together had 50% more money than R. Q and R together had 3 times as much as P had. By the end of the game P and Q together had 3 times as much as R had, and P and R together had 50% more than Q.P gained 2,000 by the end of the game.What was the total money involved?
option
a) 20,000
b) 18,000
c) 15,000
d) 24,000