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CBSE Class 6 Answered

  How many numbers in all do we have with 7 digits?  
Asked by kushwah.ritu10 | 13 Apr, 2019, 07:00: PM
answered-by-expert Expert Answer
In seven digit number 
1st digit - 9 possibilities (1,2,3,4,5,6,7,8,9)
2nd - 10 (0,1,2,3,4,5,6,7,8,9)
3rd 4th 5th 6th and 7th same 10
so in all we have = 9 x 10 x 10 x 10 x 10 x 10 x 10 = 9000000 numbers
Answered by Arun | 14 Apr, 2019, 06:57: PM
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