问题
填空题
某市对2400名年满15岁的男生的身高进行了测量,结果身高(单位:m)在1.68~1.70这一小组的频率是0.25,则该组的人数为______.
答案
由题意,该组的人数为:2400×0.25=600(人).
故答案为:600.
某市对2400名年满15岁的男生的身高进行了测量,结果身高(单位:m)在1.68~1.70这一小组的频率是0.25,则该组的人数为______.
由题意,该组的人数为:2400×0.25=600(人).
故答案为:600.
![]() Larry要外出参加同学聚会,他给表弟Tommy写了一张留言条,请他帮忙做些事情。请根据表格提 供的信息,完成下面的留言条。
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Dear Tommy, I'm going to a party today. I need your help. In the morning, would you mind taking out 1______ after you get up? Could you please 2______ after lunch? Then, in the afternoon, please 3______ to Lisa. Also, 4______, don't forget to change water for the goldfish. If you finish all these things,I will give you a big surprise. love, Larry |