2. A bag contains 3 red balls, 6 blue balls, 5 yellow balls, 4 green balls and 2 pink balls. Cheska picks a marble and writes down the result and puts the marble back. The results are as follows R, B, G, Y, P, Y, Y, B, Y, B, B, G, P, G, B, R, Y, B, G, R. What is the experimental probability that she will pick blue ball?

A. 4/20 B. 5/20 C. 6/20 D. 7/20