(8) विद्यार्थियों में से (3) चुनकर उन्हें पंक्ति में बैठाने का expression कौन-सा है?
Which expression represents choosing (3) students from (8) and arranging them in a row?
Explanation opens after your attempt
Correct Answer
A. \(^{8}C_3\times3!\)
Concept
First choose (3) students and then arrange them in (3!) ways. In exams multiply when arrangement follows selection.
Why this answer is correct
The correct answer is A. \(^{8}C_3\times3!\). First choose (3) students and then arrange them in (3!) ways. In exams multiply when arrangement follows selection.
Exam Tip
पहले (3) विद्यार्थी चुनें और फिर (3!) तरीकों से जमाएँ। परीक्षा में चयन के बाद व्यवस्था हो तो multiplication करें।
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