Boy Mow Chau's answer to Nicole's Junior College 2 H2 Maths Singapore question.
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use standard formulas ...
E(X) =∑xP(X=x)
E(X^2 )=∑x^2 P(X=x)
Var(X)=E(X^2 )-[E(X) ]^2
E(X) =∑xP(X=x)
E(X^2 )=∑x^2 P(X=x)
Var(X)=E(X^2 )-[E(X) ]^2
Date Posted:
7 months ago
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