One day 340 million shares of stocks were sold. Among them 3/4 are domestic stocks. Among all the stocks sold 3/5 belong to institutional transactions. What is the minimum number of domestic shares could be traded by private parties on that day? 想问下这道题怎么画图解决?
想问一个数学题,有一组数,问能否确定range?
1. mean is given
2. standard deviation is given
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解答:
ken@boost.org.cn老师
提问:
7/15寂静:所有员工都大于20岁. Of the 2000 employees, is the avg age at least 35?
1. 50% 员工是大于40岁
2. 25% 员工是大于65岁
这道题网上有C和E两种争论;我所不明白的点是:条件2中的25%是否包含在条件1的里面;我觉得答案应该是C。因为:35*2000=70000岁;(1)+(2)可得41*500+66*500+21*1000=74500>70000.不知道我的思路是否正确。谢谢老师的答疑!