A man invited 100 persons in a party, they included Engineers, Scientists and Workers. He had 100 plates for the dinner. Now Engineers saw it and thought why don't we play our game. They said we will need two plates per person for the dinner. Seeing that Scientists too couldn't help, they said we will need 4 plates per person for the dinner. Now workers thought, they will fail the dinner. So they said we need only 1 plate per four person. At last the dinner was successful all 100 plates were used by the 100 persons. So can you tell me the respective number of Engineers, Scientists and Workers?