(5) अलग-अलग व्यक्तियों को (5) अलग-अलग कमरों में एक-एक करके कितने तरीकों से रखा जा सकता है?
In how many ways can (5) distinct persons be placed one each in (5) distinct rooms?
Explanation opens after your attempt
Correct Answer
A. (120)
Concept
This is a one-to-one arrangement of (5) persons and (5) rooms, so (5!=120). In exams, assignments to distinct rooms are permutations.
Why this answer is correct
The correct answer is A. (120). This is a one-to-one arrangement of (5) persons and (5) rooms, so (5!=120). In exams, assignments to distinct rooms are permutations.
Exam Tip
यह (5) व्यक्तियों और (5) कमरों की एक-एक व्यवस्था है, इसलिए (5!=120)। परीक्षा में distinct rooms हों तो assignment भी permutation है।
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