state gov DSSSB Junior Clerk Mock Test Quantitative Aptitude Permutation and Combination

विभिन्न अंकों वाली कितनी 9 अंकों वाली संख्याएं बनायीं जा सकती हैं?

1
10
2
2 × 9!
3
9 × 9!
4
9 × 3!
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