यदि पुनरावृत्ति allowed न हो तो (4) अंकों से (3) स्थान भरने की संख्या कौन-सी होगी?
If repetition is not allowed what is the number of ways to fill (3) positions using (4) digits?
Explanation opens after your attempt
Correct Answer
B. \(^{4}P_3\)
Concept
Without repetition the choices are (4), (3), (2) so \(^{4}P_3\) is correct. In exams use permutation when there is no repetition.
Why this answer is correct
The correct answer is B. \(^{4}P_3\). Without repetition the choices are (4), (3), (2) so \(^{4}P_3\) is correct. In exams use permutation when there is no repetition.
Exam Tip
बिना पुनरावृत्ति विकल्प (4), (3), (2) होते हैं इसलिए \(^{4}P_3\) सही है। परीक्षा में no repetition पर permutation लगाएँ।
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