There are eight elements in the universal set U.
U={ 1, 2, 3, 4, 5, 6, 7, 8}
P', which is called the complement of P, describes everything in the universal set that is not included in P.
P=& { 2, 4, 6, 8}
U=& { 1, 2, 3, 4, 5, 6, 7, 8}
P'=& { 1, 3, 5, 7}