A 22
B 25
C 23
D 27
Correct Answer: Option C
n(A U B) = n(A) + n(B) - n(A ∩ B). n(A ∩ B)= n(A) + n(B) - n(A U B) so, n(A ∩ B)= (30 +54)-61 =23
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