aleem0891
aleem0891
19-01-2018
Mathematics
contestada
Prove that E(cX)=cE(X), where c is a constant.
Respuesta :
mathmate
mathmate
19-01-2018
By definition:
E(x)
= ( ∑ xi )/ n
this means that
E(cx)
= ( ∑ cxi )/ n
= ( c ∑ xi )/ n [ by taking out the common factor c]
= c ( ∑ xi )/ n
= c E(x)
Conclusion: proved E(cx)=cE(x)
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