Probability is such a nightmare for me, here's a two part Q I'm struggling with.
A jar contains 5 red, 2 blue and 3 green marbles. What is the probablity of choosing:
a) at least one green and at least one red marble
b) at least one red given that at least one green is chosen
For part B I'm using the formula of Pr(A|B) = Pr(A int B) / (Pr B), but I cannot for the life of me figure out how to get the intersection of "at least one red" and "at least one green".
Help would be much appreciated, thanks all!