题目信息
A box contains 6 black balls and 4 white balls. If two balls are selected at random without replacement, what is the probability that both balls are white?
A:$$\frac{7}{90}$$
B:$$\frac{3}{25}$$
C:$$\frac{2}{15}$$
D:$$\frac{4}{25}$$
E:$$\frac{4}{9}$$
参考答案及共享解析

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已选答案:
正确答案:
C:$$\frac{2}{15}$$
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题目来源
Magoosh