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If E(X)=1 and Var(X)=5, find Var( 2X+5)

If E(X)=1 and Var(X)=5, find Var( 2X+5)

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Answer #1

= Var(ax+b);

Therefore,

Var(2x+5)= [Given: E(x) =1, var(x)=5 ]

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