August 2018 1 37 Report
1. jika n( a)=20 , n(b) =16 dan n(a irisan b)=4 maka n( a gabungan b) adalah .....

2.diketahui n(a)=40, n(b)=30 , dan n(a gabungan b= 50 . tentukan n(a irisan b).......

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