Question

Q.1 B) Solve the following
i) If n(A) = 11. n(B) = 7. n(AUB) = 13 then find n(A^B).​

Answer 1

$Hence, \:\:\:\:\:\:\: \:\:\:\:\:\:\: \:\:\:\:\:\:\:\:\:\:\:\:\:\: \:\:\:\:\:\:\: \:\:\:\:\:\:\: \:\:\:\:\:\:\: \:\:\:\:\:\:\:\:\:\:\:\:\:\:\\ \boxed{n(A∪B)=n(A) +n(B)-n(A∩B)} \\ \\ ∴13 = 11 + 7 - n(A∩B) \\ \\ ∴13 = 18 - n(A∩B) \\ \\ ∴18 - 13 = n(A∩B) \\ \\ ∴ 5= n(A∩B)\\ \\ ∴ \green{\boxed{ n(A∩B) = 5}}</p><p>$

Answer 2

Answer:

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