A bag contains three green marbles, four blue marbles, and two orange marbles. If a marble is picked at random, then the probability that it is not an orange marble is
Total numbers of elementary events are: 3+ 4 + 2= 9
Let E be the event of getting not an orange marble
Numbers of Favorable outcomes are: 3 + 4 = 7
P (not an orange marble) = P (E) = 7/9