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How many 4 digit number are …

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How many 4 digit number are there with no digit repeated
  • 5 answers

Shamsher Hassan 7 years, 1 month ago

no. 0 to 9 total numbers= 10 1000th place can't be filled by 0 bcoz if 0 is used then it will become 3 digit number so 1000th place can only be filled by 1 to 9 No. Of ways of filling 1000th place= 9 No. Of ways of filling unit,10th & 100th place= 9×8×7 Required 4 digit number = 9×9×8×7= 4536

Keshav Bindal 7 years, 1 month ago

=4536

Keshav Bindal 7 years, 1 month ago

9×9×8×7

Sanjeev Yadav 7 years, 1 month ago

There are such 9 numbers

Lakshmi Paathak 7 years, 1 month ago

9*8*7*10
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