A bag contains 4 blue marbles, 2 black marbles, and 3 red marbles. If a marble is randomly drawn from the bag, what is probability that it is NOT black?
There are 4 blue marbles There are 2 black marbles There are 3 red marbles There are a total of 9 marbles You minus the black marbles from the total 9-2=7 If there are 7 non black marbles then the ratio is 7:9 7:9 is the probability that you won't get a black marble
