题目信息
A jar contains 16 marbles, of which 4 are red, 3 are blue, and the rest are yellow. If 2 marbles are to be selected at random from the jar, one at a time without being replaced, what is the probability that the first marble selected will be red and the second marble selected will be blue?
A:$$\frac{3}{64}$$
B:$$\frac{1}{20}$$
C:$$\frac{1}{16}$$
D:$$\frac{1}{12}$$
E:$$\frac{1}{8}$$
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正确答案：
B:$$\frac{1}{20}$$
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