Question

请教一道英文概率统计问题X is a discrete random variable. It's possible v

Answer 1

那个,我不是很知道如果要用英文写过程的话要怎么表达……

直接给个式子和答案吧：

1-0.25-0.35-0.10=0.30

其实这题从数学上说很简单,所以如果非要说过程的话……我想可不可以这样表达

X is a discrete random variable and It's possible values are 2,4,6,8.so P(X=2)+P(X=4)+P(X=6)+P(X=8)=1

now we know P(X=2)=0.25,P(X=4)=0.35,P(X=6)=0.10,

so P(X=8)=1-[P(X=2)+P(X=4)+P(X=6)]=1-0.25-0.35-0.10=0.30