A bag contains 5 red, 4 blue and 3 green balls. If 2 ballsare picked at random, what is the probability that both are red?  Choose the correct choice from the following options
A) 1 / 13
B) 2 / 23
C) 5 / 33
D) 4 / 27
E) 3 / 23

Rationale: "p ( both are red ) , = 5 c 212 c 2 = 5 c 212 c 2 = 10 / 66 = 5 / 33 c"
Answer: C