英语翻译a group of 7-year-olds are going to a park with a group

英语翻译
a group of 7-year-olds are going to a park with a group of 11-year-olds.if the average age of the two groups together is 9.4 years.how many of each age group are there?

阳光下空谷幽香 1年前已收到2个回答举报

lily923 春芽

共回答了17个问题采纳率：82.4% 举报

一群7岁的孩子跟一群11岁的孩子同去公园.如果两群小孩合在一起的年龄平均数是9.4岁,那么每群小孩的个数是多少?
分别是4个和6个嘛~
其实人数比应该是2:3,因为是一群,所以排除掉2个人,因此我的答案是4个和6个

1年前

darkdove 幼苗

共回答了47个问题举报

一群7岁的孩子跟一群11岁的孩子同去公园。如果两群小孩合在一起的年龄平均数是9.4岁，那么每群小孩的个数是多少？

1年前

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