Question:
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
(a) $\frac{1}{4}$
(b) $\frac{1}{3}$
(C) $\frac{4}{9}$
(d) $\frac{7}{9}$
Solution:
GIVEN: A bag contains 3green, 4blue and 2orange marbles
TO FIND: Probability of not getting an orange marble
Total number of balls 3+4+2=9
Total number of non orange marbles that is green and blue balls is
We know that PROBABILITY = 
Hence probability of getting a non orange ball is 
Hence the correct option is