(7) people में से (3) को क्रम वाली queue में चुनने की count \(^{7}C_3\cdot3!\) क्यों है?
Why is the count for choosing (3) people from (7) into an ordered queue equal to \(^{7}C_3\cdot3!\)?
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Correct Answer
A. पहले group चुनते हैं फिर उस group को order देते हैंFirst choose the group then order that group
Concept
Order of selected people is meaningful in a queue. In exams derive ordered selection as combination times factorial.
Why this answer is correct
The correct answer is A. पहले group चुनते हैं फिर उस group को order देते हैं / First choose the group then order that group. Order of selected people is meaningful in a queue. In exams derive ordered selection as combination times factorial.
Exam Tip
Queue में selected people की order meaningful होती है। परीक्षा में ordered selection को combination times factorial से derive करें।
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