\({}^{9}P_{1}\) का मान क्या है?
What is the value of \({}^{9}P_{1}\)?
Explanation opens after your attempt
A. (9)
Concept
Since \({}^{n}P_{1}=n\), \({}^{9}P_{1}=9\). For one position, count the available objects directly.
Why this answer is correct
The correct answer is A. (9). Since \({}^{n}P_{1}=n\), \({}^{9}P_{1}=9\). For one position, count the available objects directly.
Exam Tip
\({}^{n}P_{1}=n\) होता है इसलिए \({}^{9}P_{1}=9\)। एक स्थान के लिए सीधे उपलब्ध वस्तुएँ गिनें।
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