(6) अलग-अलग प्रश्नों को (6) क्रमांकित स्थानों में लगाना है। प्रश्न (1) और प्रश्न (2) के बीच ठीक (1) प्रश्न हो, तो व्यवस्थाओं की संख्या कितनी है?
(6) distinct questions are arranged in (6) numbered positions. If exactly (1) question lies between question (1) and question (2), how many arrangements are possible?
Explanation opens after your attempt
B. (192)
Concept
There are (4) position pairs at distance (2) and (2!) orders for questions (1) and (2), and the remaining (4) questions arrange in (4!) ways. Exam tip: exactly one between means position difference (2).
Why this answer is correct
The correct answer is B. (192). There are (4) position pairs at distance (2) and (2!) orders for questions (1) and (2), and the remaining (4) questions arrange in (4!) ways. Exam tip: exactly one between means position difference (2).
Exam Tip
प्रश्न (1) और (2) के लिए दूरी (2) वाले (4) position-pairs और (2!) क्रम हैं, बाकी (4) प्रश्न (4!) तरीकों से लगेंगे। परीक्षा में exactly one between का अर्थ position difference (2) है।
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