Question

SCC LibraryLet S = {1, 2, 3, ..., 18, 19, 20} be the universal set.Let sets A and B be subsets of S, where:Set A = {2, 4, 5, 6, 10, 13, 16, 18}Set B = {1, 3, 4, 5, 6, 8, 9, 12, 13, 14, 15, 17, 18)Determine the following:n(A) =n(A)n(B) =n(ANB) =n(AUB) =

Answer 1

n(A)=8. There are 8 numbers in set A

n(not A)=12. There are 12 numbers in S that are not in set A

n(B)= 13. There are 13 numbers in set B

n(A and B)= 5 There are 4 common numbers in both sets A and B

n(AUB)=16 There are 16 numbers in set A and B, not counting repea