Subject: General Aptitude · Chapter: Ratio and Proportion · Exam: · Marks: · Difficulty:
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 :
Having $X$ and $Y$
10
Having $X$ but not $Y$
30
Having $Y$ but not $X$
20
Having neither $X$ nor $Y$
40
(a)1 : 2
(b)2 : 3
(c)3 : 2
(d)4 : 3
Answer
Answer (as printed): D
Explanation
Number of people having characteristic $$X=(10+30)=40 .$$ Number of people having characteristic $$Y=(10+20)=30 .$$ ∴ Required ratio $=40: 30=4: 3$.
Explanation as extracted from the printed page; notation may be imperfect.