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If \( \Large n \left(A\right)=6, n \left(B\right)=5, n \left(A\cap B\right)=3 \) then find \( \Large n \left(A\cup B\right) \)
A) 11
B) 9
C) 8
D) None of these
Correct answer:
C) 8
Description for Correct answer:
\( \Large n \left(A\cup B\right) = n \left(A\right)+n \left(B\right)-n \left(A\cap B\right) \)
= 6+5-3 = 8
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