i need a general form to solve Prob(a or b or c ... or z) that r not mutually exclusive.(adsbygoogle = window.adsbygoogle || []).push({});

i managed to derive it for 2,3 and 4 variables but i can't seem to get a general form out of it, its recursive.

any1 know a way?

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# Prob(a or b or c or z) NOT mutually exclusive

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