So for general expected value, I know how to do it. Multiply probablity of X to the value of X and add them up. For density function such as(adsbygoogle = window.adsbygoogle || []).push({});

f(x) = 2x 0<x<1 and 0 otherwise. I take find the integral. I'm just confused when it comes to something like

f(x) = (x - 8) 8 < x < 9; (10 -x ) 9 < x < 10; 0 otherwise. I hope someone can help me clear this up lolz. Thanks veryyyyyy much

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# I need some help with some probability

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