一批产品中有一、二、三等品,等外品及废品五种,其产值分别为每件6元,5.4元,5元,4元及0元,相应的概率分别为0.7,0.1,0.1,0.06,0.04。则该批产品的平均产值为()。
一批产品中有一、二、三等品,等外品及废品五种,其产值分别为每件6元,5.4元,5元,4元及0元,相应的概率分别为0.7,0.1,0.1,0.06,0.04。则该批产品的平均产值为()。
A.12
B.96
C.62
D.68
正确答案:D
一批产品中有一、二、三等品,等外品及废品五种,其产值分别为每件6元,5.4元,5元,4元及0元,相应的概率分别为0.7,0.1,0.1,0.06,0.04。则该批产品的平均产值为()。
A.12
B.96
C.62
D.68
正确答案:D
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