अंकों (1,2,3,4,5,6,7,8,9) से बिना पुनरावृत्ति (4)-अंकीय संख्याएं बनती हैं। संख्या (6000) से बड़ी होनी चाहिए। कुल संख्याएं कितनी हैं?
Using the digits (1,2,3,4,5,6,7,8,9) without repetition (4)-digit numbers are formed. The number must be greater than (6000). How many numbers are possible?
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Correct Answer
B. (1344) संख्याएं(1344) numbers
Concept
The thousand place is one of (6,7,8,9) and the remaining places have (8,7,6) choices. The total is \(4 \times 8 \times 7 \times 6=1344\).
Why this answer is correct
The correct answer is B. (1344) संख्याएं / (1344) numbers. The thousand place is one of (6,7,8,9) and the remaining places have (8,7,6) choices. The total is \(4 \times 8 \times 7 \times 6=1344\).
Exam Tip
हजार स्थान (6,7,8,9) में से होगा और बाकी स्थानों पर (8,7,6) विकल्प होंगे। कुल \(4 \times 8 \times 7 \times 6=1344\) है।
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