Такс.
12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69 и тд.
N=30
N(A)=6
P(A)=6/30=0,5
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Такс.
12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69 и тд.
N=30
N(A)=6
P(A)=6/30=0,5