Question

In a town, 65% of people watched the news on television, 40% read a newspaper and 25% read a newspaper and watched the news on television also. What percent of people neither watched the news on television nor read a newspaper?

• A. 5
• B. 10
• C. 15
• D. 20
• E. 25

Hint:

Use formula: \[ A + B - (A \cap B) \] for two-set problems.

Answer 1

The Correct Option is D

Using inclusion–exclusion principle: \[ 65 + 40 - 25 = 80 \] People who did at least one: \[ 80\% \] People who did neither: \[ 100 - 80 = 20\% \] \[ \therefore \text{Answer = 20\%} \]