X1、X2...X100是自然数,X1
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X1、X2...X100是自然数,X1
X1到X50的平均数X25.5.X51到X100的平均数X75.5.
则当X25.5最大为A时,X75.5至少为A+50.
A*50 + (A+50)*50
= 100A + 2500 = 7001
A= 45.01 ,最大 = 44.5 即为 X25.5的值,换算为X1、X50,得
X1到X50最大 = 20+21+……+69 = 2225
则当X25.5最大为A时,X75.5至少为A+50.
A*50 + (A+50)*50
= 100A + 2500 = 7001
A= 45.01 ,最大 = 44.5 即为 X25.5的值,换算为X1、X50,得
X1到X50最大 = 20+21+……+69 = 2225
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