\(^{7}P_2\) को \(^{7}C_2\) से कैसे जोड़ा जाएगा?
How will \(^{7}P_2\) be connected with \(^{7}C_2\)?
Explanation opens after your attempt
Correct Answer
D. \(^{7}P_2=^{7}C_2\times2!\)
Concept
First choose (2) objects and then arrange them in (2!) ways. In exams understand permutation as combination times arrangement.
Why this answer is correct
The correct answer is D. \(^{7}P_2=^{7}C_2\times2!\). First choose (2) objects and then arrange them in (2!) ways. In exams understand permutation as combination times arrangement.
Exam Tip
पहले (2) वस्तुएँ चुनें और फिर उन्हें (2!) तरीकों से जमाएँ। परीक्षा में permutation को combination गुणा व्यवस्था समझें।
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