# 4-digit number

How many 4-digit numbers are there with no digit repeated?

[email_link] http://solvemaths.in/4-digit-number/ProbabilityHow many 4-digit numbers are there with no digit repeated?

Kishor
Kumarhi.friend_zone@rocketmail.comSubscriberSOLVE - ΜΔΓΗŠ
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For thousands place, the digit can be anything but 0. So total 9 possibility.

For hundreds place, any of the 10 digits can be present, except the thousands-digit number. So 9 possibility again.

For tens place, any of the 10 digits except the two digits used above. So 8 possibilities.

Lastly, for ones place, any of the 10 digits except the three used already. So 7 possibilities.

This, the total number of 4-digit number with no digit repeated = 9 x 9 x 8 x 7 = 4536