\({}^{6}P_{6}\) का मान क्या होगा?
What will be the value of \({}^{6}P_{6}\)?
Explanation opens after your attempt
Correct Answer
A. (720)
Concept
When (r=n), \({}^{n}P_{n}=n!\), so \({}^{6}P_{6}=720\). Use factorial when all are selected.
Why this answer is correct
The correct answer is A. (720). When (r=n), \({}^{n}P_{n}=n!\), so \({}^{6}P_{6}=720\). Use factorial when all are selected.
Exam Tip
जब (r=n) हो तो \({}^{n}P_{n}=n!\), इसलिए \({}^{6}P_{6}=720\)। पूरा चयन होने पर factorial लें।
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