Jawabanmu

2014-09-10T04:32:34+07:00
P + Q - irisan = union
30 + 21 - 10 = 41
2014-09-10T04:34:46+07:00
Union=n(P)+n(Q)=21+30=51

jika n(P) irisan (Q)= 10

51-10= 41
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