From statement II Total readers = 200 Number of readers who read Indian Express = 100 Number of readers who read Times of India =121 Number of readers who neither read Indian Express nor Times of India = 50 ∵n(A∪B)=n(A)+n(B)−n(A∩B) =100+121−(200−50) =221−150=71 ∴ Required number of people who read both Indian Express and Times of India =71