Because there are a total of 10 marbles in the bag, and 4 of them are blue, the probability that it is not blue is:
(10-4)/10, 4 of them are blue so subtract 4 from the total of 10, and place that over 10, the total.
6/10, or 3/5.
A bag contains 5 red marbles, 4 blue marbles, and 1 green marble. If a marble is selected at random, what is the probability that it is not blue?
3 answers
Perfect that is what I got
A box contains 3 blue, 5 red, 4 white marbles. If one marble drawn at random: find probability of blue given not white. Find probability of not red given not white.