A bag contains 5 red, 6 blue and 4 green balls. If 2 ballsare picked at random, what is the probability that both are red?	Choose the correct choice
A) 2 / 15
B) 2 / 21
C) 5 / 26
D) 3 / 29
E) 4 / 27

Rationale: p ( both are red ) , = 5 c 215 c 2 = 5 c 215 c 2 = 10 / 105 = 2 / 21 b
Answer: B