(100) विद्यार्थियों में (40) केवल (A), (28) केवल (B) और (12) दोनों में हैं। कम से कम एक में आने वाले कितने हैं?
Among (100) students, (40) are only in (A), (28) are only in (B), and (12) are in both. How many are in at least one?
Explanation opens after your attempt
A. (80)
Concept
At least one means the union, so (40+28+12=80). Add the only regions and the both region separately.
Why this answer is correct
The correct answer is A. (80). At least one means the union, so (40+28+12=80). Add the only regions and the both region separately.
Exam Tip
कम से कम एक का अर्थ संघ है, इसलिए (40+28+12=80) है। केवल और दोनों वाले भागों को अलग-अलग जोड़ें।
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