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10 cards from this deck
Events that cannot happen at the same time.
Rolling a 3 and a 5 cannot happen together.
P(6) = 1/6 for a standard dice.
They must add up to 1.
P(A or B) = P(A) + P(B).
P(red or yellow) = 0.4 + 0.4 - P(red and yellow)
P(Other) = 0.35 (total must equal 1).
P(green or yellow) = 0.25 + 0.3 = 0.55.
P(not A) = 1 - P(A).
They can occur together, so use different methods.
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