वेन आरेख में केवल (A) में (26), केवल (B) में (31), केवल (C) में (24), केवल \(A\cap B\) में (14), केवल \(B\cap C\) में (16), केवल \(C\cap A\) में (12) और तीनों में (9) तत्व हैं। ठीक एक समुच्चय में आने वाले तत्व कितने हैं?
In a Venn diagram, only (A) has (26), only (B) has (31), only (C) has (24), only \(A\cap B\) has (14), only \(B\cap C\) has (16), only \(C\cap A\) has (12), and all three have (9) elements. How many elements are in exactly one set?
Explanation opens after your attempt
A. (81)
Concept
Exactly one includes only the single-only regions, so (26+31+24=81). Do not add regions belonging to two or three sets.
Why this answer is correct
The correct answer is A. (81). Exactly one includes only the single-only regions, so (26+31+24=81). Do not add regions belonging to two or three sets.
Exam Tip
ठीक एक में केवल अलग-अलग एकल भाग आते हैं, इसलिए (26+31+24=81) है। दो या तीन समुच्चयों वाले भाग न जोड़ें।
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