An urn contains 6 red, 5 blue and 2 green marbles. If 2 marbles are picked at random, what is the probability that both are red?  Choose the correct choice from the following choices:
A) 6 / 13 B) 5 / 26 C) 6 / 26 D) 9 / 26 E) 10 / 27

Rationale: option ( b ) is correct p ( both are red ) , 6 c 2 / 13 c 2 = 5 / 26 answer b
Answer: B