Let G be a finite group and C(G) be the family of representative conjugacy classes of
subgroups of G. The matrix whose H;K-entry is the number of fixed points of the set
G=K under the action of H is called the table of marks of G where H;K run through all
elements in C(G). In this paper, we compute the table of marks and the markaracter table
of groups of order pqr where p, q, r are prime numbers.