joho38
27.09.2021 •
Mathematics
If n(A) =15 n (B) = 9 n(A∩B) =4
find n(A U B)
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Ответ:
20
Step-by-step explanation:
n(A) only =15-4=11
n(B) only=9-4=5
n(A n B)=4
n(A U B)=11+5+4=20
Ответ:
It's C i think.