问题
填空题
高二某个文科班有男同学10人,女同学40人,现用分层抽样的方法抽取10个同学参加问卷调查,则应抽取男同学______人,女同学______人.
答案
每个同学被抽到的概率等于
=10 10+40
,故应抽取男同学数为10×1 5
=2,1 5
故应抽取女同学数为40×
=8,1 5
故答案为 2,8.
高二某个文科班有男同学10人,女同学40人,现用分层抽样的方法抽取10个同学参加问卷调查,则应抽取男同学______人,女同学______人.
每个同学被抽到的概率等于
=10 10+40
,故应抽取男同学数为10×1 5
=2,1 5
故应抽取女同学数为40×
=8,1 5
故答案为 2,8.
根据短文内容,用方框中所给的单词的适当形式填空,每词限用一次。
The best children’s books are 小题3:________very difficult nor very simple, and satisfy the child who hears the story and the adult who reads it. 小题4:________, there are in fact few books like this, so the problem of 小题5:________ the right bedtime story is not easy to solve. |