A box contains of 8 red balls, 10 green balls and 2 white balls. a ball is removed from the box and replaced, the balls are mixed, and then another...

A box contains of 8 red balls, 10 green balls and 2 white balls. a ball is removed from the box and replaced, the balls are mixed, and then another ball is removed. what is the probabability of;

1.a white ball on the first draw?

2.a white ball on the first draw and a red ball on the second?

3.two green balls being drawn?

4.a red ball on the second draw, given that a white ball is drawn on the first?