A probability distribution of a variable `X` is given below: `X :01234` `P(X):0. 10. 250. 30. 20. 15` Find (i) `V a r(X)` (ii) `V a r(X/2)`

Explanation

`var(x)=E(X^2)-(E(X))^2`


`sum P_i X_i^2-(sum P_i X_i)^2`


` sum P_i X_i^2=0.(0.1)^2+1(0.25)+2^2(0.3)+3^2(0.2)+4^2(0.15)`


`0.25+1.2+1.8+2.4`


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