How many different 6digit numbers can be formed using the di

How many different 6-digit numbers can be formed using the digits 1, 2, 3, 4, 5, 6, and 7? Repeated digits are allowed.

Solution

no. -1,2,3,4,5,6,7

suppose there are six boxes so in each box u can put 7 no. ! so total no. of arrangmnet is 7^6

total 6-digit numbers = 7*7*7*7*7*7

= 7^6

=117649