目标变量在训练集上的8个实际值[0,0,0,1,1,1,1,1],目标变量的熵是多少?

目标变量在训练集上的8个实际值[0,0,0,1,1,1,1,1]，目标变量的熵是多少?

A.-(5/8log(5/8)+3/8log(3/8))

B.5/8log(5/8)+3/8log(3/8)

C.3/8log(5/8)+5/8log(3/8)

D.5/8log(3/8)–3/8log(5/8)