[求助]GWD 24-4，谢谢。

bipedalisms

4 A shipment of 8 television sets contains 2 black-and-white sets and 6color sets. If 2 television sets are to be chosen at random from this shipment, what is the probability that at least 1 of the 2 sets chosen will be a black-and-white set?

1/7 B. ? C. 5/14 D. 11/28 E. 13/26
大家看看那个是正确答案，我怎么找不到阿. 谢谢。

observer

我认为是[C（8，2）-C（6，2）]/C（8，2）=13/28

找不到对应选项

bipedalisms

谢谢！我的答案和你的一样。