Mathematics · Permutations and Combinations
शब्द 'MAGIC' के अक्षरों का उपयोग करके बिना दोहराव के 5 अक्षरों का एक कोड बनाया जाता है। ऐसे कितने कोड बनाए जा सकते हैं जिनमें 'A' कभी भी शुरुआत या अंत में न हो?
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