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In how many ways can (5) different bells be placed at (5) fixed positions?(5) अलग-अलग घंटियों को (5) निर्धारित स्थानों पर लगाने के तरीके कितने हैं?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (120)(120)
(5) different bells can be placed at (5) positions in (5!=120) ways. Arrangements at fixed positions use factorial.(5) अलग घंटियाँ (5) स्थानों पर (5!=120) तरीकों से लगेंगी। निर्धारित स्थानों की arrangement factorial से होती है।
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