SOLUTION: If A and B are disjoint sets then n(AUB)=n(A)+n(B). Verify with the help of example

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Question 1034187: If A and B are disjoint sets then n(AUB)=n(A)+n(B). Verify with the help of example
Answer by sachi(548) About Me  (Show Source):
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let A={1,2,3,4} so n(A)=4
& B={5,6,7) so n(B)=3
now AUB={1,2,3,4,5,6,7} & n(AUB)=7
clearly n(AUB)=n(A)+ n(B)
ans