A bag contains 4 red, 3 blue and 2 green balls. If 2 ballsare picked at random, what is the probability that both are red? Choose the correct option:
A) 1 / 13 B) 2 / 23 C) 1 / 6 D) 4 / 27 E) 3 / 23

Rationale: "p ( both are red ) , = 4 c 29 c 2 = 4 c 29 c 2 = 6 / 36 = 1 / 6 c"
Answer: C