\(x_1+x_2+x_3=20\) में \(x_1\geq3\), \(x_2\geq4\), \(x_3\geq5\) हो, तो count क्या है?
In \(x_1+x_2+x_3=20\), if \(x_1\geq3\), \(x_2\geq4\), \(x_3\geq5\), what is the count?
Explanation opens after your attempt
A. \(^{10}C_2\)
Concept
Removing the minimum (3+4+5=12) leaves (8). In exams shift unequal lower bounds first.
Why this answer is correct
The correct answer is A. \(^{10}C_2\). Removing the minimum (3+4+5=12) leaves (8). In exams shift unequal lower bounds first.
Exam Tip
Minimum (3+4+5=12) हटाने पर (8) बचता है। परीक्षा में unequal lower bounds को पहले shift करें।
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