甲乙丙三个数的平均数是40,三个数的比是2:1:3：,求这三个数各是多少?
人气：254 ℃ 时间：2019-11-14 12:01:41
解答
40*3*2/(2+1+3)=40
40*3*1/(2+1+3)=20
40*3*3/(2+1+3)=60
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