Question

(a) If
n(A) = 12 ,n(B) = 23 and n(AUB)=30
then find n( AXB) , n(A-B), n(B-A), and
n(A∆B)​

Answer 1

Answer:

n(U)=20,n(A)=12,n(B)=9,n(A∩B)=4  

∴  n(A∪B)=n(A)+n(B)−n(A∩B)  =12+9−4=17 Hence, n[(A∪B)c]=n(U)−n(A∪B)

20−17=3

Step-by-step explanation:

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