单项选择题

已知目标变量有 [0,0,0,1,1,1,1,1] 8 个实际值,则目标变量的熵是所少?
A、5/8 log(3/8) – 3/8 log(5/8)
B、3/8 log(5/8) + 5/8 log(3/8)
C、5/8 log(5/8) + 3/8 log(3/8)
D、-(5/8 log(5/8) + 3/8 log(3/8))

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