ABC三个数的平均数是70,A:B=2:3,B:C=4:5,
则:A=______,B=______,C=______.
人气:204 ℃ 时间:2019-08-17 01:45:08
解答
A:B=2:3=8:12,
B:C=4:5=12:15,
A:B:C=8:12:15;
70×3=210,
8+12+15=35,
A=210×
=48,
B=210×
=72,
C=210×
=90.
故答案为:48,72,90.
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