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How many (3)-letter codes can be formed from letters (K,L,M,N) without repetition?अक्षरों (K,L,M,N) से बिना पुनरावृत्ति कितने (3)-अक्षरी कोड बनेंगे?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (24)(24)
({}^{4}P_{3}=4\times3\times2=24) codes are possible. In a code, changing positions changes the code.({}^{4}P_{3}=4\times3\times2=24) कोड बनेंगे। कोड में अक्षरों का स्थान बदलने से कोड बदल जाता है।
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