Shoppers at Retailer R who purchased substitute items from other manufacturers on DayI paid a total amount that was approximately 78 of the total shoppers would have paid had each of them been able to purchase ProductXon Day 1.
“was 和 would have paid ”都在一个从句里,怎末会有两个谓语动词?“had each of them been able to...”这部分是跟谁啊?看不懂
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!