4 people sitting round table held the ball first. 3.! howWith that, my father and mother sit at 4.Therefore, parents must be provided separately. 4 × 3 = 12All method (3) = 72 ways (12)
The four children were seated before a round table organized three! How is that for parents who sit insert 4 , so parents need to arrange separate 4 × 3 = 12 ways to arrange all (3) (12) = 72 ways.
The child 4 people sit round table before the 3! How have a father and mother seat insert 4 that so. Arrange the parents must separately 4 × 3 = 12 how how all the (3!) (12) = 72 ways.