4. The density function of the continuous random variable X, the total number of hours, inunits of 100 hours that a family runs a vacuum cleaner over a period of one year, is given as f(x) = x, 0 < x < 1 2 - x, 1 ≤ x < 2 0, elsewhereFind the average number of hours per year that families run their vacuum cleaners. Findthe variance of X.

A continuous random variable probability density function f(x)=... | Filo

11. A continuous random Variable x has a density function f(x)=... | Filo