अंकों (0,1,2,3,4,5,6,7,8) से बिना पुनरावृत्ति (5) अंकों की कितनी संख्याएं बनेंगी जिनमें (0) शामिल हो?
How many (5)-digit numbers can be formed from (0,1,2,3,4,5,6,7,8) without repetition and containing (0)?
Explanation opens after your attempt
A. (6720)
Concept
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).
Why this answer is correct
The correct answer is A. (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).
Exam Tip
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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