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.	Choose the correct answer:
A) 3 : 5  B) 3 : 4  C) 4 : 3  D) 5 : 3  E) 1 : 2
Number of people having characteristic X = 10 + 20= 
<gadget id="calculator">10 + 20</gadget>
<output>30</output>
30   Number of people having characteristic Y= 20 + 30= 
<gadget id="calculator">20 + 30</gadget>
<output>50</output>
50   Therefore Required ratio= 30 : 50 = 3 : 5   3 : 5NSWER:3 : 5
<result>A</result>
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.