\(x_1+x_2+x_3+x_4=18\) में exactly (2) variables zero हों, तो count क्या है?
In \(x_1+x_2+x_3+x_4=18\), if exactly (2) variables are zero, what is the count?
Explanation opens after your attempt
Correct Answer
A. \(^{4}C_2{}^{17}C_1\)
Concept
Choose the zero variables first, then the remaining two variables form a positive sum of (18). In exams use positive distribution for exactly-zero cases.
Why this answer is correct
The correct answer is A. \(^{4}C_2{}^{17}C_1\). Choose the zero variables first, then the remaining two variables form a positive sum of (18). In exams use positive distribution for exactly-zero cases.
Exam Tip
पहले zero variables चुनें, फिर बाकी दो variables positive sum (18) बनाते हैं। परीक्षा में exactly zero cases में positive distribution लगाएं।
Login to save your score, XP, coins and progress.