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How many (4)-digit odd numbers can be formed from (1,2,3,4,5,6) without repetition?अंकों (1,2,3,4,5,6) से बिना पुनरावृत्ति (4) अंकों की कितनी विषम संख्याएं बनेंगी?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (180)(180)
There are (3) odd choices for the units place and the remaining places are filled in (5\cdot4\cdot3) ways. The total is (180).इकाई स्थान पर (3) विषम अंक हैं और शेष स्थान (5\cdot4\cdot3) तरीकों से भरते हैं। कुल (180) संख्याएं मिलती हैं।
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