Abox has some red and some green balls in it. there are no balls of any other color. some of these balls are heavy and the rest are all light. what is the probability that a heavy red ball is picked out of the box?

I'm confused on this could anyone me and show me what i need to do to solve it.

Aroulette wheel has 38 slots in which the ball can land. two of the slots are green, 18 are red, and 18 are black. the ball is equally likely to land in any slot. the roulette wheel is going to be spun twice, and the outcomes of the two spins are independent.the probability that it lands one time on red and another time on black in any order is(a) 0.5 (b) 0.25 (c) 0.4488 (d) 0.2244

Typically a point in a three dimensional cartesian coordinate system is represented by which of the following answers in the picture !