1. The probability of finding 22 1 is: (c1/3 * C2/3 * c1/3)/(C5/9) = 9/14; (The first C 1/3 means 1 from three identical colored balls, C2/3 means 2 from three identical colored balls, and the last C 1/3 means 1 from 22 1. There may be three different colors. )

That is, the probability of players paying money is 9/14;

2. Similarly, the probability of "320" is: (C3/3 * C2/3 * P3/3)/(C5/9) =18/126 =17; The probability of "3 1 1" is (C3/3 * c1/3 * c1/3)/(C5/9) = 27/126 = 3.

The expected profit is: 9/14 * 5-3/14 * 2-1/7 *10 =19/14.