Diketahui n(A) =7 , n (B)=6 , n(A u B)=11, tentukan n (A n B)
Matematika
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Pertanyaan
Diketahui n(A) =7 , n (B)=6 , n(A u B)=11, tentukan n (A n B)
1 Jawaban
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1. Jawaban ahreumlim
n(A) = 7
n(B) = 6
n(A ∪ B) = 11
n(A ∪ B) = n(A) + n(B) - n(A ∩ B)
11 = 7 + 6 - n(A ∩ B)
n(A ∩ B) = 13 - 11
n(A ∩ B) = 2