Question: Find the variance of the random variable X having a probability function f and range RX in each of the following cases: 2-x-21 (i) f(x)=

Find the variance of the random variable X having a probability function f and range RX in each of the following cases: 2-x-21 (i) f(x)= ,x Rx = {1,2,3}; 4 (ii) f(x) = (iii)

2-x-21 (i) f(x)= ,x Rx = {1,2,3}; 4 (ii) f(x) = (iii) f(x)= 4+x-12 42 x-3+1 28 , x = Rx = {1,2,3); ,x Rx = (-3, -2, -1, 0, 1, 2, 3}; 4-x (iv) f(x)= 6 x = Rx = {1,2.3).

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