If 3/4 of the Police employees are not graduates, the ratio of graduates to non-graduates employees in the Police Department is?

A) 1: 3

B) 3 : 7

C) 3 : 4

D) 4 : 3

Let total employs = 1

Non-graduated employes= 3/4

Remaining graduated employes= 1 – (3/4)

                                                          = 1/4

graduated employes : Non-graduated employes

                             1/4    :     3/4    

                                    1 :  3