How many four soochit numbers are there with no digit repeated ?
Priyanshu kumar , 7 Years ago
Grade 11
Algebra> How many four soochit numbers are there w...
1 Answers
Arun
Last Activity: 7 Years ago
Dear Priyanshu
1st digit can be filled by 9 ways.(excluding 0)
2nd digit can be filled with 9 fills (including 0)
3rd digit cab be filled by 8 ways
4th digit can be filled by 7 ways.
Hence total numbers = 9*9*8*7 = 81* 56 = 4536
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