Question

how to calculate n(A intersection B) when it is not given? ​

Answer 1

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{n(A ∪ B) = n(A) + n(B) – n(A ∩ B) Simply, the number of elements in the union of set A and B is equal to the sum of cardinal numbers of the sets A and B, minus that of their intersection

Answer 2

B' means all terms that are not included

in B set okk

i.e = A = (1,2,3,4,5,6,7,8)

B = (1,3,5,7)

So,B' = (2,4,6,8)

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