SOLUTION: A bag is filled with 9 white tokens, 5 blue tokens 4 green tokens and 2 red tokens Two tokens are drawn from the bag without replacement. What is the probability that both tokens

In total, there are  9 + 5 + 4 + 2 = 20 tokens.


With the probability    we select blue token at the first draw;


and then with the probability    we select blue token at the second draw.


Therefore, the answer to the problem's question is  P =  =  = .