(10) अलग-अलग वस्तुओं में से (4) को एक पंक्ति में सजाने की संख्या क्या है?
What is the number of ways to arrange (4) objects selected from (10) distinct objects in a row?
Explanation opens after your attempt
A. (5040)
Concept
This is \(^{10}P_4=10\cdot9\cdot8\cdot7=5040\). In exams, selected and arranged means use \(nP_r\).
Why this answer is correct
The correct answer is A. (5040). This is \(^{10}P_4=10\cdot9\cdot8\cdot7=5040\). In exams, selected and arranged means use \(nP_r\).
Exam Tip
यह \(^{10}P_4=10\cdot9\cdot8\cdot7=5040\) है। परीक्षा में selected and arranged हो तो \(nP_r\) लगाएं।
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