A B C D E 5個數的平均數是67.2 , C是最大
A B D E 4個數的平均數是41.9
A和C相差83
~A的值是多少?
小學平均數
2014-01-02 7:55 pm
回答 (4)
2014-01-02 8:11 pm
✔ 最佳答案
A+B+C+D+E/5=67.2...(1)A+B+D+E/4=41.9...(2)
A+B+D+E=41.9 X 4...(3) from (2)
&C=67.2 X 5 - 41.9 X 4=168.4 from (1) & (3)
As C-A=83, sub C=168.4 above, and C>A, B, D, E,
A=168.4-83
=85.4
參考: ME
2014-01-04 11:10 pm
(2)A B C D E=67.2x5=336
(1)A B D E=41.9x4=167.6
A B C D E=67.2x5=336-A B D E=41.9x4=167.6=C=168.4
A=C(168.4)-83/+83
A=85.4/251.4
(1)A B D E=41.9x4=167.6
A B C D E=67.2x5=336-A B D E=41.9x4=167.6=C=168.4
A=C(168.4)-83/+83
A=85.4/251.4
2014-01-03 1:51 am
(2)A B C D E=67.2x5=336
(1)A B D E=41.9x4=167.6
(2)-(1),C=168.4
A=C(168.4)-83
A=85.4
(1)A B D E=41.9x4=167.6
(2)-(1),C=168.4
A=C(168.4)-83
A=85.4
參考: X
2014-01-02 8:42 pm
67.2x5= A B C D E
C>A B D E
41.9x4= A B D E
41.9x4=167.6
67.2x5=336
336-167.6= C ( 168.4 )
168.4-83= A ( 85.4 )
整條數式: ( 67.2x5-41.9x4 )-83= 85.4
希望幫到你!
C>A B D E
41.9x4= A B D E
41.9x4=167.6
67.2x5=336
336-167.6= C ( 168.4 )
168.4-83= A ( 85.4 )
整條數式: ( 67.2x5-41.9x4 )-83= 85.4
希望幫到你!
參考: 我
收錄日期: 2021-04-20 14:39:13
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140102000051KK00051