(4) अलग अक्षरों से repetition not allowed होने पर (3)-letter codes की संख्या क्या होगी?
How many (3)-letter codes can be made from (4) distinct letters when repetition is not allowed?
Explanation opens after your attempt
B. \(^{4}P_3\)
Concept
For an ordered code without repetition there are \(4\times3\times2\) ways. In exams a code has order.
Why this answer is correct
The correct answer is B. \(^{4}P_3\). For an ordered code without repetition there are \(4\times3\times2\) ways. In exams a code has order.
Exam Tip
बिना पुनरावृत्ति ordered code के लिए \(4\times3\times2\) तरीके हैं। परीक्षा में code में order होता है।
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