question_answer

In a bag there are 3 black, 4 red and 5 green balls. A ball is drawn at random. Find the probability that it is green or red ball.

A)  \[\frac{3}{12}\]                        

B)  \[\frac{4}{12}\]

C)  \[\frac{5}{12}\]                        

D)  \[\frac{9}{12}\]

E)  None of these