hi, this is my question:
A second bag also containing 3 red balls, 2 yellow balls and 1 blue ball, identical except for their colours.
Sandi picks one ball from the bag at random.
B) Given that Sandi does not pick a yellow ball, what is the probability that she picks a red.
would the probability that she picks a red be 3/6? or would it be 3/4 because you take 2 yellow balls from all the ball put to gether which is 6?