2019 · Q16
Consider the following for the next three (03) items:
In a certain town of population size 1,00,000 three types of newspapers (I, II and III) are available. The percentages of the people in the town who read these papers are as follows:
Newspaper I: 10%, Newspaper II: 30%, Newspaper III: 5%, Both I and II: 8%, Both II and III: 4%, Both I and III: 2%, All the three (I, II and III): 1%
What is the number of people who read only one newspaper?
Elementary MathematicsSet Theory
- A20,000
- B25,000
- C30,000
- D35,000
Explanation
Only-I = 10−8−2+1 = 1%, only-II = 30−8−4+1 = 19%, only-III = 5−4−2+1 = 0%. Reading exactly one paper: 1+19+0 = 20% of 1,00,000 = 20,000.