(4) मित्रों को (2) विशेष सीटों पर कितने तरीकों से बैठाया जा सकता है?
In how many ways can (4) friends be seated on (2) special seats?
Explanation opens after your attempt
B. (12)
Concept
Order matters on two special seats, so \({}^{4}P_{2}=12\). If seats are distinct, use permutation.
Why this answer is correct
The correct answer is B. (12). Order matters on two special seats, so \({}^{4}P_{2}=12\). If seats are distinct, use permutation.
Exam Tip
दो विशेष सीटों पर क्रम महत्त्वपूर्ण है इसलिए \({}^{4}P_{2}=12\)। सीटें अलग हों तो permutation लें।
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