\(x_1+x_2+x_3=21\) और \(x_i\geq3\) हो, तो हलों की संख्या क्या होगी?

If \(x_1+x_2+x_3=21\) and \(x_i\geq3\), what is the number of solutions?

Explanation opens after your attempt
Correct Answer

A. \(^{14}C_2\)

Step 1

Concept

Giving (3) first to each variable leaves (12), then count non-negative solutions. In exams shift the minimum condition.

Step 2

Why this answer is correct

The correct answer is A. \(^{14}C_2\). Giving (3) first to each variable leaves (12), then count non-negative solutions. In exams shift the minimum condition.

Step 3

Exam Tip

हर variable को पहले (3) देने पर (12) बचता है, फिर अऋणात्मक हल गिनते हैं। परीक्षा में minimum condition को shift करें।

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Mathematics Answer, Explanation and Revision Hints

\(x_1+x_2+x_3=21\) और \(x_i\geq3\) हो, तो हलों की संख्या क्या होगी? / If \(x_1+x_2+x_3=21\) and \(x_i\geq3\), what is the number of solutions?

Correct Answer: A. \(^{14}C_2\). Explanation: हर variable को पहले (3) देने पर (12) बचता है, फिर अऋणात्मक हल गिनते हैं। परीक्षा में minimum condition को shift करें। / Giving (3) first to each variable leaves (12), then count non-negative solutions. In exams shift the minimum condition.

Which concept should I revise for this Mathematics MCQ?

Giving (3) first to each variable leaves (12), then count non-negative solutions. In exams shift the minimum condition.

What exam hint can help solve this Mathematics question?

हर variable को पहले (3) देने पर (12) बचता है, फिर अऋणात्मक हल गिनते हैं। परीक्षा में minimum condition को shift करें।