i just can’t understand this i know the eq is P(at least one)= 1-P(all occur) but every time i do the problems i get them wrong ??? like for some reason the equation changes my teacher has tried to explain it but i just don’t get it
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You’ve made a small mistake. Probably of “at least 1” is actually 100% – the probability of none. `P(at least one) = 1 – P(none)`
Just because the probability of “none” tends to be easiest to figure out, especially since it’s a single goal to calculate, this equation tends to be easiest to work with.
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