Thread: random variable proof
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Old November 23rd, 2008, 12:58 PM
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Originally Posted by maths_123 View Post
Hi sorry to be a pain, but how do you do part ii as you have helped me on part i and iii but not ii
If E(A) <1

1> E(A) \ge p(A \ge 1)

But P(A=0)+P(A\ge 1)=1, so P(A \ge 1)<1 implies P(A=0)>0

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