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
79
P (Picking an orange marble) = 29
Probability of picking a green marble = 39
Probabilty of picking a blue marble = 49
Hence the probability of picking a green marble + Probability of picking a blue marble = Probability of not picking an orange marble
39 + 49
= 79