Determine the ratio of the number of people having characteristic X to the number of people having characteristic Y in a population of 100 subjects from the following table
People having X and Y are 20
People having X but not Y are 10
People having Y but not X are 30
People having neither X nor Y are 40.
a) 3 : 5
b) 3 : 2
c) 1 : 2
d) 2 : 3
e) None of these
People having X and Y are 20
People having X but not Y are 10
People having Y but not X are 30
People having neither X nor Y are 40.
a) 3 : 5
b) 3 : 2
c) 1 : 2
d) 2 : 3
e) None of these