Answer
C' = {b,c,d,e,f}
Work Step by Step
U = {a,b,c,d,e,f,g}
C = {a,g}
Find C'
Set C' includes all the elements in 'U' that are not in set C.
Since set C contains {a,g} so these elements cant be in set C.
Therefore the elements of set C' are b,c,d,e,f.
Therefore C' = {b,c,d,e,f}