(1) From the known one, the ratio of red ball to white ball is 2: 3, set to 2x, 3x, and substitute it into the known two:

(3/5)*(3x- 1)/(5x- 1)= 1/3

x=2

That is, six white balls and four red balls.

(2) 1-(4/ 10)*(3/9)*(2/8)=29/30