Question

Let U = {l, m, n, o, p, q, r, s}, X = {l, n, p, r}, Y = {m, o, q}, Z = {m, n, r, s}. Find the (X U Y) - (X n Z')

Answer 1

where do you find the problem?

Answer 2

Consider the set {2, 4, 6, 8}: How many subsets have less than 2 elements?