Mathematics · Permutations and Combinations
शब्द SENECAP के अक्षरों (अक्षर: S, E, N, E, C, A, P; जहाँ E दो बार आता है) से, 7 अक्षरों के कितने अलग-अलग विन्यास (arrangements) बनाए जा सकते हैं ताकि: i) पहला अक्षर एक व्यंजन (consonant) हो, और ii) कोई भी दो स्वर (vowels) एक साथ न हों?
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