一批产品中,一,二,三等品率分别为0.8,0.16,0.04.若规定一,二等品为合格品,求产品的合格率.帮忙解答的先谢谢了.

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一批产品中,一,二,三等品率分别为0.8,0.16,0.04.若规定一,二等品为合格品,求产品的合格率.帮忙解答的先谢谢了. 产品的合格率为:0.8+0.16=0.96.Ｐ(A)=0.8Ｐ(B)=0.16Ｐ(A+B)=Ｐ(A)+Ｐ(B)=0.8+0.16=0.96.

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产品的合格率 = 0.8 + 0.16 = 0.96