某产品分一、二、三级,其中一、二级是正品,若生产中出现正品的概率是0.98,二级品的概率是0.21,那么出现一级品与三级品的概率分别是( )
A.0.77,0.21 | B.0.98,0.02 |
C.0.77,0.02 | D.0.78,0.22 |
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某产品分一、二、三级,其中一、二级是正品,若生产中出现正品的概率是0.98,二级品的概率是0.21,那么出现一级品与三级品的概率分别是( )
A.0.77,0.21 | B.0.98,0.02 |
C.0.77,0.02 | D.0.78,0.22 |