at a certain company, a test was given to a group of men and women seeking promotions. If the average (arithmetic mean) score for the group was 80, was the average score for the women greater than 85?
1 the average score for the men was less than 75
2 the group consisted of more men than women.
OG上给的答案太难记了,有简单一些的办法看出来吗? 单看的话觉得是E
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【请May老师回答】这题鸡精提供的答案是D 可是我觉得第二个条件不能得出呢 假设n三次方是x平方 除以n平方 是可以得到x/ n 平方 但是x/n 不一定是整数呀?