यदि (10) लोगों में से (5) की समिति और उसी समिति से (1) संयोजक चुनना हो, तो expression क्या होगा?
If a committee of (5) is formed from (10) people and then (1) coordinator is chosen from that committee, what is the expression?
Explanation opens after your attempt
C. \(^{10}C_5\times5\)
Concept
First there are \(^{10}C_5\) ways to form the committee and (5) choices for coordinator. In exams multiply when a role follows selection.
Why this answer is correct
The correct answer is C. \(^{10}C_5\times5\). First there are \(^{10}C_5\) ways to form the committee and (5) choices for coordinator. In exams multiply when a role follows selection.
Exam Tip
पहले committee के \(^{10}C_5\) तरीके हैं और संयोजक के (5) विकल्प हैं। परीक्षा में selection के बाद role हो तो multiply करें।
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