Question

If u={1,2,3,4,5},A={2,4} and Beta {2,5,5}find n(AUB)​

Answer 1

u={1,2,3,4,5},A={2,4} and Beta {2,5,5}

now, (AUB)={1,3,3,4,5}

[AUB is the set of all elements of set A and set B without any repetition ]

n(AUB)=5

n(AUB)is the total no of elements in set (AUB)