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\( \Large n \left(A\cup B\right)=8,\ n \left(A\right)=6,\ n \left(B\right)=4 \) find \( \Large n \left(A\cap B\right) \)
A) 10
B) 7
C) 2
D) 4
Correct answer:
C) 2
Description for Correct answer:
\( \Large n \left(A\cup B\right)=8,\ n \left(A\right)=6,\ n \left(B\right)=4 \)
\( \Large n \left(A\cup B\right)=n \left(A\right)+n \left(B\right)-n \left(A\cap B\right) \)
\( \Large 8 = 6+4-n \left(A\cap B\right) \)
\( \Large n \left(A\cap B\right) = 10-8=2 \)
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