10
The largest number with no repeated digits is 9,876,543,210 although it is 10 digits long, the largest 3 digit number with no repeated digits is 987
102
It is 99,887,765
There are only two smaller 3-digit numbers and both of them have repeated digits.
If one can repeat digits, each of the three positions in a three-digit password can be filled by any of the 10 digits (0-9). Therefore, the total number of three-digit numerical passwords is (10 \times 10 \times 10 = 1,000). Thus, there are 1,000 possible three-digit numerical passwords when digits can be repeated.
The largest number with no repeated digits is 9,876,543,210 although it is 10 digits long, the largest 3 digit number with no repeated digits is 987
102
It is 99,887,765
It is possible to create a 3-digit number, without repeated digits so the probability is 1.
There are only two smaller 3-digit numbers and both of them have repeated digits.
If one can repeat digits, each of the three positions in a three-digit password can be filled by any of the 10 digits (0-9). Therefore, the total number of three-digit numerical passwords is (10 \times 10 \times 10 = 1,000). Thus, there are 1,000 possible three-digit numerical passwords when digits can be repeated.
757
Repeated twice means we're allowed three of them. That would be 88,866,644. If you really meant repeated, that would be 88,664,420
Using the digits of 1345678, there are 210 three digit numbers in which no digit is repeated.
102 is the smallest three digit number with different digits.
1
27 three digit numbers from the digits 3, 5, 7 including repetitions.