diketahui n(P)=21,n(Q)=30,maka carilah n(PUQ) jika n(P∩Q)=10 (PUQ)=p irisan q

Question

Matematika Diposting : 2014-10-27 Diupdate : 2021-10-05 tetamagenta

Pertanyaan

diketahui n(P)=21,n(Q)=30,maka carilah n(PUQ) jika n(P∩Q)=10

(PUQ)=p irisan q

Answer 1

PuQ=nP+nQ-n(PnQ) = 21+30-10 = 41

Answer 2

n(P-(P n Q))=21-10=11
n(Q-(P n Q))=30-10=20
n(P n Q)=10
n( P U Q)=n(P-(P n Q)) + n(Q-(P n Q)) + n(P n Q)
=11+10+20
=41