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2) 5! = 1*2*3*4*5 = 120
3) 3! = 6 2! = 2 5! = 120 6+2 = 8 8/120 = 1/15
4)P(AUB) = P(A) + P(B) - P(A^B) = 2/3 + 1/6 - 5/6 = 0 < coś mi tu nie gra zobacz czy dobrze przepisałeś