(1) से (15) तक की संख्याओं में से (4) संख्याएँ ऐसी चुननी हैं कि कोई दो क्रमागत न हों। कुल चयन कितने हैं?

From the numbers (1) to (15), (4) numbers are chosen so that no two are consecutive. How many selections are possible?

Explanation opens after your attempt
Correct Answer

A. (495)

Step 1

Concept

The formula gives \( \binom{15-4+1}{4}=\binom{12}{4}=495 \). For no-consecutive selections, take combinations from reduced positions.

Step 2

Why this answer is correct

The correct answer is A. (495). The formula gives \( \binom{15-4+1}{4}=\binom{12}{4}=495 \). For no-consecutive selections, take combinations from reduced positions.

Step 3

Exam Tip

सूत्र \( \binom{15-4+1}{4}=\binom{12}{4}=495 \) देता है। क्रमागत-वर्जित चयन में घटे हुए स्थानों से संयोजन लें।

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Mathematics Answer, Explanation and Revision Hints

(1) से (15) तक की संख्याओं में से (4) संख्याएँ ऐसी चुननी हैं कि कोई दो क्रमागत न हों। कुल चयन कितने हैं? / From the numbers (1) to (15), (4) numbers are chosen so that no two are consecutive. How many selections are possible?

Correct Answer: A. (495). Explanation: सूत्र \( \binom{15-4+1}{4}=\binom{12}{4}=495 \) देता है। क्रमागत-वर्जित चयन में घटे हुए स्थानों से संयोजन लें। / The formula gives \( \binom{15-4+1}{4}=\binom{12}{4}=495 \). For no-consecutive selections, take combinations from reduced positions.

Which concept should I revise for this Mathematics MCQ?

The formula gives \( \binom{15-4+1}{4}=\binom{12}{4}=495 \). For no-consecutive selections, take combinations from reduced positions.

What exam hint can help solve this Mathematics question?

सूत्र \( \binom{15-4+1}{4}=\binom{12}{4}=495 \) देता है। क्रमागत-वर्जित चयन में घटे हुए स्थानों से संयोजन लें।