Question

If A={2,4,6,8,10} and B={1,3,5,7,9} are two disjoint sets verify that n(AUB)=n(A)+n(B).​

Answer 1

Answer:

(AUB) = {1,2,3,4,5,6,7,8,9,10}

n(AUB) = 10

n(A) = 5

n(B) = 5

n(A) + n(B) = 5 + 5 = 10

hence proved