(7) अलग-अलग विद्यार्थियों को (7) अलग-अलग बेंचों पर एक-एक बैठाने के कितने तरीके हैं?
In how many ways can (7) distinct students be seated one each on (7) distinct benches?
Explanation opens after your attempt
A. (5040)
Concept
The number of seating (7) students in (7) distinct positions is (7!=5040). In exams, use factorial when positions are distinct.
Why this answer is correct
The correct answer is A. (5040). The number of seating (7) students in (7) distinct positions is (7!=5040). In exams, use factorial when positions are distinct.
Exam Tip
(7) विद्यार्थियों को (7) अलग स्थानों पर बैठाने की संख्या (7!=5040) है। परीक्षा में positions अलग हों तो factorial लगाएं।
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