NO.PZ2015120604000069
问题如下:
Among 600 workers, 25 workers plan to retire next year. On a random drawn, what is the probability that select a worker who plans to retire next year?
选项:
A. 0.042.
B. 0.040.
C. 0.002.
解释:
A is correct
我觉得公式是600C 25 从600里面抽取25个 计算器算出来里没有这个数