question_answer

A bag contains 5 black balls, 4 white balls and 3 red balls. If a ball is selected randomly, then the probability that it is a black or red ball is:

A) \[\frac{1}{3}\]              

B) \[\frac{1}{4}\]

C) \[\frac{5}{12}\]             

D) \[\frac{2}{3}\]

E) None of these