Question

if A and B are disjoint sets than n ( A union B) = n( A) + n ( B ) this statement is true or false
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Answer 1

Answer:

Yes, if A and B are disjoint then n(A U B) = n(A)+n(B)

Check Venn Diagram Representation to know it easily.

Answer 2

Solution : Since they both are disjoint sets and have no elements in common the number of elements in the union set will be the sum of the number of elements in A and number of elements in B. using formula it can be explained as follows :

n(AUB) = n (A) + n (B) - n ( A intersection

B).