[問題] 請問這樣想有沒有問題
X r.v's
P(X>n)=P(I_{X>n} X>n)
n>0
(i)If X<=n
P(X>n)=0=P(I_{X>n} X>n)
(ii)If X>n
當然相等
這樣對嗎@@
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