(8) विद्यार्थियों में से चार अलग-अलग पदों के लिए चयन कितने तरीकों से होगा?
In how many ways can (4) different posts be filled from (8) students?
Explanation opens after your attempt
B. (1680)
Concept
Order matters for different posts, so \(^{8}P_4=1680\). In exams, do not use combination when posts are different.
Why this answer is correct
The correct answer is B. (1680). Order matters for different posts, so \(^{8}P_4=1680\). In exams, do not use combination when posts are different.
Exam Tip
अलग पदों में क्रम महत्वपूर्ण है, इसलिए \(^{8}P_4=1680\)। परीक्षा में पद अलग हों तो combination नहीं लगाएं।
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