Multiple choice general knowledge

In a survey of town of Wasco, it was found that 65% of the people surveyed watched the news on television, 40% read newspaper, and 25% read a newspaper and watched the news on television. What percent of the people surveyed neither watched the news on the television nor read a newspaper?

  1. 30

  2. none

  3. 20

  4. 10

  5. 15
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Using the principle of inclusion-exclusion: People who do at least one activity = 65% + 40% - 25% = 80%. Therefore, people who do neither activity = 100% - 80% = 20%. The 25% who do both are counted twice in the sum 65% + 40%, so we subtract once to get the correct count.

Keep practicing — related questions