(10) seats की row में (4) selected students को बैठाने और बाकी seats empty छोड़ने की count किस expression से जुड़ती है?
The count for seating (4) selected students in a row of (10) seats while leaving other seats empty is connected with which expression?
Explanation opens after your attempt
B. \(^{10}P_4\)
Concept
Choosing seats first and then arranging students gives \(^{10}C_4\cdot4!=^{10}P_4\). In exams count both positions and arrangements.
Why this answer is correct
The correct answer is B. \(^{10}P_4\). Choosing seats first and then arranging students gives \(^{10}C_4\cdot4!=^{10}P_4\). In exams count both positions and arrangements.
Exam Tip
पहले seats चुनना और फिर students arrange करना \(^{10}C_4\cdot4!=^{10}P_4\) है। परीक्षा में seat-position और arrangement दोनों गिनें।
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