किसी पुस्तकालय में (150) विद्यार्थियों में (83) उपन्यास पढ़ते हैं, (69) कविता पढ़ते हैं और (28) कोई भी नहीं पढ़ते। दोनों पढ़ने वाले कितने हैं?
In a library, among (150) students, (83) read novels, (69) read poetry and (28) read neither. How many read both?
Explanation opens after your attempt
A. (30)
Concept
At least one is (150-28=122), so both is (83+69-122=30). First get the union from the outside part.
Why this answer is correct
The correct answer is A. (30). At least one is (150-28=122), so both is (83+69-122=30). First get the union from the outside part.
Exam Tip
कम से कम एक (150-28=122) है, इसलिए दोनों (83+69-122=30) हैं। पहले संघ को बाहर वाले भाग से निकालें।
Login to save your score, XP, coins and progress.
