# Math Help - Proving Variance and Mean.

1. ## Proving Variance and Mean.

Prove Var(X+t) = Var(X) for any random variable X and constant t.

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My Attempt. I can only do this much, I am kinda lost.

Thanks

2. ## Re: Proving Variance and Mean.

Originally Posted by blackZ
Prove Var(X+t) = Var(X) for any random variable X and constant t.

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My Attempt. I can only do this much, I am kinda lost.

Thanks
If t is a constant then the values of E(t), E(t^2) etc. should be obvious ..... Then everything simplifies ....