英语翻译A bag contains 6 chips,numbered 1 through 6,If 2 chips a
2个回答

一袋中有6个芯片,编号为1到6,如果随机选择2个芯片,两个芯片编号的乘积大于20概率是多少

解

所有结果用15种,

{1,2}

{1,3}

{1,4}

{1,5}

{1,6}

{2,3}

{2,4}

{2,5}

{2,6}

{3,4}

{3,5}

{3,6}

{4,5}

{4,6}

{5,6}

积大于20的有两种

{4,6}

{5,6}

the probability that this product will be greater than 20 is Two fifteenths

如果是：what is the probability that this product will be no greater than 20?,选择【E】

意思是不大于20的概率,看看是否少一个：no

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