यदि \(^{12}P_4\) को \(^{12}C_4\) से प्राप्त करना हो, तो किस factor से गुणा करना होगा?
If \(^{12}P_4\) is to be obtained from \(^{12}C_4\), by which factor should it be multiplied?
Explanation opens after your attempt
C. (4!)
Concept
The relation is \(^{n}P_r=^{n}C_r\times r!\), so here the factor is (4!). In exams add the arrangements of selected objects when going from (C) to (P).
Why this answer is correct
The correct answer is C. (4!). The relation is \(^{n}P_r=^{n}C_r\times r!\), so here the factor is (4!). In exams add the arrangements of selected objects when going from (C) to (P).
Exam Tip
संबंध \(^{n}P_r=^{n}C_r\times r!\) है, इसलिए यहाँ factor (4!) होगा। परीक्षा में (C) से (P) जाने पर चुनी वस्तुओं की arrangements जोड़ें।
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