\(x_1+x_2+x_3+x_4=15\) में सभी \(x_i\geq1\) हों तो count कौन-सी है?
If all \(x_i\geq1\) in \(x_1+x_2+x_3+x_4=15\), what is the count?
Explanation opens after your attempt
Correct Answer
C. \({}^{11}C_3\)
Concept
Give (1) to each variable first, then (11) remain. In exams subtract the number of variables for positive solutions.
Why this answer is correct
The correct answer is C. \({}^{11}C_3\). Give (1) to each variable first, then (11) remain. In exams subtract the number of variables for positive solutions.
Exam Tip
पहले हर variable को (1) दें, फिर (11) बचते हैं। परीक्षा में positive solutions में total से variables की संख्या घटाएं।
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