A box contains 3 blue, 2 white and 4 red marbles. If a marbles. If a marble is drawn at random from the box, what is the probability that it will not be a white marble?
Total possible outcomes = Total number of marbles
= ( 3 + 2 + 4) = 9
Let E be the event of not getting a white marble.
It means the marble can be either blue or red but not white.
Number of favourable outcomes = (3 + 4) = 7 marbles
∴ P(not getting a white marble ) =`7/9`