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Let random variable X denote the time (in years) it takes to develop a software. Suppose...

Let random variable X denote the time (in years) it takes to develop a software. Suppose that X has the following probability density function: f(x)= 5??4 if 0 ≤ x ≤ 1, and 0 otherwise. b. Write the CDF of the time it takes to develop a software. d. Compute the variance of the number of years it takes to develop a software.

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