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How many (5)-digit numbers can be formed from (0,1,2,3,4,5,6,7,8) without repetition and containing (0)?अंकों (0,1,2,3,4,5,6,7,8) से बिना पुनरावृत्ति (5) अंकों की कितनी संख्याएं बनेंगी जिनमें (0) शामिल हो?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (6720)(6720)
Total valid (5)-digit numbers are (8\cdot{}^{8}P_4), and those without (0) are (^{8}P_5). The difference is (13440-6720=6720).कुल वैध (5)-अंकीय संख्याएं (8\cdot{}^{8}P_4) हैं और बिना (0) वाली (^{8}P_5) हैं। अंतर (13440-6720=6720) है।
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