Question

If A and B are disjoint sets then n(AuB) = ?​

Answer 1

Given : A and B are disjoint sets

To Find : n(A∪B)

Solution:

two sets are said to be disjoint sets if they have no element in common.

Hence  n ( A ∩ B) = 0  as no common element

n(A∪B)  = n(A) + n(B) -   n ( A ∩ B)

Substitute n ( A ∩ B)  = 0

=> n(A∪B)  = n(A) + n(B) -   0

=> n(A∪B)  = n(A) + n(B)

hence n(A∪B)  = n(A) + n(B) if A and B are disjoint sets

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Answer 2

Answer:

5answer but if set is 5and (aub