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