\(x_1+x_2+x_3+x_4+x_5=12\) में exactly (3) variables positive हों, तो count क्या होगा?
In \(x_1+x_2+x_3+x_4+x_5=12\), if exactly (3) variables are positive, what is the count?
Correct answer and explanation
A. \(^{5}C_3{}^{11}C_2\)
Simple Explanation
पहले (3) positive variables चुनें, फिर (12) को (3) positive parts में बांटें। परीक्षा में exactly positive variables में choose variables plus positive stars-bars करें। / Choose the (3) positive variables first, then split (12) into (3) positive parts. In exams use choose variables plus positive stars and bars for exactly positive variables.
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