A bag contains 5 red, 6 blue and 2 green balls. If 2 ballsare picked at random, what is the probability that both are red?
Choose one:	A) 1 / 13	B) 2 / 23	C) 5 / 39	D) 4 / 27	E) 3 / 23

Rationale: "p ( both are red ) , 5 c 213 c 2 = 6 c 213 c 2 = 10 / 78 = 5 / 39 c"
Answer: C