Q.10 Find the variance and standard deviation for brand B paint data 35, 45, 30, 35, 40,25 _________________________________ Example: The random variable X, representing the number of selective missiles when 3 missiles are fired"has the following probability distribution: 0 1 2 3 P(X = x) 0.51 0.38 0.10 0.01 Find mean and variance.

_________________________________ Example: Calculate the mean and variance of g(x) = 2X + 3, where X is a random variable with probability distribution X 0 1 2 3 f(x) 1/4 1/8 1/2 1/8

find mean and variance

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