समीकरण \(x_{1}+x_{2}+x_{3}+x_{4}=13\) के अऋण पूर्णांक हलों की संख्या कितनी है यदि हर \(x_i\leq5\) हो?
How many non-negative integer solutions does \(x_{1}+x_{2}+x_{3}+x_{4}=13\) have if each \(x_i\leq5\)?
Explanation opens after your attempt
B. (104)
Concept
Subtract cases with \(x_i\geq6\) from total \(^{16}C_{3}\) and add double-overlap cases. (560-480+24=104).
Why this answer is correct
The correct answer is B. (104). Subtract cases with \(x_i\geq6\) from total \(^{16}C_{3}\) and add double-overlap cases. (560-480+24=104).
Exam Tip
कुल \(^{16}C_{3}\) से \(x_i\geq6\) वाले मामले घटाकर दोहरे मामले जोड़ें। (560-480+24=104)।
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