Suppose U = {1, 2, 3, 4, 5, 6, 7, 8} is the universal set and P = {1, 2, 3, 4}. What is P"?

The complement of set P, denoted as P', is the set of all elements in the universal set U that are not in P.

Since P = {1, 2, 3, 4}, P' would be the set of all elements in U that are not in {1, 2, 3, 4}.

Therefore, P' = {5, 6, 7, 8}.