A carnival game is played by choosing 1 of 3 pools with rubber ducks and picking a duck from the pool. In pool 1 there are 4 winning ducks and 20 regular ducks. In pool 2 there are 2 winning ducks and 25 regular ducks. In pool 3 there are 5 winning ducks and 18 regular ducks. What is the probability of selecting a winning duck