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Anyway, we are trying to calculate the probability of an event after an a previous event has already happened.
There are 10 marbles, 2 white, 5 black, and 3 gray
What is the probability of drawing a white marble from a bag if all marbles are put in the bag at the start? Ok, this one is easy, it is 2/10 or 1/5.
The marbles are not returned to the bag after drawing. What is the probability that the second marble is gray?
So, the issue I have is if the first marble drawn is gray, then the probability that the second marble is gray will be different than if a different color was drawn first.
Can anyone help me figure out the probability of the second marble being gray?