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In how many ways can (4) friends be seated on (2) special seats?(4) मित्रों को (2) विशेष सीटों पर कितने तरीकों से बैठाया जा सकता है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (12)(12)
Order matters on two special seats, so ({}^{4}P_{2}=12). If seats are distinct, use permutation.दो विशेष सीटों पर क्रम महत्त्वपूर्ण है इसलिए ({}^{4}P_{2}=12)। सीटें अलग हों तो permutation लें।
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