A glass jar contains 6 black, 8 blue, 4 white and 3 red marbles. If a single marble is chosen at random from the jar, what is the probability that it is blue or red?
1
\(\frac{11}{21}\)
2
\(\frac{8}{21}\)
3
\(\frac{5}{21}\)
4
\(\frac{1}{7}\)
5
Question Not Attempted