Let X be the number of life years before certain kind of CFL bulb needs …
Let X be the number of life years before certain kind of CFL bulb needs replacement. Let X have the probability mass function (pmf) is defined as f(x) = ax° r = 0,1,2,3,4 where a is some real constant. (a) Find the value of constant a. (b) Find the commulative distribution function (cdf) F of X.
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