# A bag has 5 red marbles, 4 green marbles and 3 blue marbles

A bag has 5 red marbles, 4 green marbles and 3 blue marbles. All marbles are identical in all respects other than colour. A marble is taken out from the bag without looking into it. What is the probability that it is a non-green marble?

(a) 1/3

(b) 2/3

(c) 7/12

(d) 5/12