कौन-सा formula \(^{n}P_1\) का सही सरलीकरण देता है?
Which formula gives the correct simplification of \(^{n}P_1\)?
Explanation opens after your attempt
Correct Answer
A. \(^{n}P_1=n\)
Concept
Only one position is to be filled so there are (n) choices. In exams for (r=1) permutation and combination both equal (n).
Why this answer is correct
The correct answer is A. \(^{n}P_1=n\). Only one position is to be filled so there are (n) choices. In exams for (r=1) permutation and combination both equal (n).
Exam Tip
एक स्थान भरना है इसलिए (n) विकल्प मिलते हैं। परीक्षा में (r=1) पर permutation और combination दोनों (n) होते हैं।
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