A bag contains 4red, 5blue and 3green balls. If 3 ballsare picked at random, what is the probability that both are red? Choose the correct choice from the following choices.
A) 1/33  B) 1/22  C) 1/12  D) 1/44  E) 1/55
P(Both are red),   =4C3/12C3=1/55   1/55
<result>E</result>
A bag contains 4red, 5blue and 3green balls. If 3 ballsare picked at random, what is the probability that both are red?