अक्षरों (K,L,M,N) से बिना पुनरावृत्ति कितने (3)-अक्षरी कोड बनेंगे?
How many (3)-letter codes can be formed from letters (K,L,M,N) without repetition?
Explanation opens after your attempt
C. (24)
Concept
\({}^{4}P_{3}=4\times3\times2=24\) codes are possible. In a code, changing positions changes the code.
Why this answer is correct
The correct answer is C. (24). \({}^{4}P_{3}=4\times3\times2=24\) codes are possible. In a code, changing positions changes the code.
Exam Tip
\({}^{4}P_{3}=4\times3\times2=24\) कोड बनेंगे। कोड में अक्षरों का स्थान बदलने से कोड बदल जाता है।
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