soal dari n(s) = 34, n (A)=17, n (B) =18 n(A' n B')=2 HITUNGLAH nilai dari n ( A n B )

jawab
n(s)= 34
n(A) = 17
n(B) = 18
n(A' n B') = n(AUB)' = 2

n(S) = n(A) + n(B) + n(AUB)' - n(A n B)
34 = 17 + 18 + 2 - n(A nB)
n(A n B) = 37 - 34 = 3