一道考题，不会做！

bjxiaobei

joshua and jose work at an auto repair center with 4 other workers. for a survey on healthcare insurance, 2 of the 6 workers will be randomly chosen to be interviewed. what is the probability that joshua and jose will both be chosen?

teddyabc

1/C2 6 希望你看得懂~~= =确实不知道怎么打出来~~

zhangfan90

六选二，共6*5\2=15种，所以这一种情形概率是1\15。ipad打不出除号那个斜杠，用反的代替了

bjxiaobei

多谢2、3楼！我看懂了,就是6个人中选2个的组合，每2个人被选到的概率都是一样的，不用特别考虑是不是这两个人被选到？