College Mathematics

posted by .

Counting Principles and Permutation. A social security number consists of 9 digits. How many different social security numbers are possible if repetition of digits is permitted

• College Mathematics -

If the lead digit can be a zero
then 10^9
If the lead digit cannot be a zero
then 9(10^8)

• College Mathematics -

If the lead digit can be a zero
then 10^9
If the lead digit cannot be a zero
then 9(10^8)

Similar Questions

1. Data management

from the digits 0,1,2,3,4,5,6,7,8,9 find the number of a) 4-digit numbers with repetition of digits b) 4-digit numbers without repetition of digits c) the number of odd 4-digit numbers with no repetition of digits d) the number of …
2. data management

from the digits 0,1,2,3,4,5,6,7,8,9 find the number of a) 4-digit numbers with repetition of digits b) 4-digit numbers without repetition of digits c) the number of odd 4-digit numbers with no repetition of digits d) the number of …
3. Math

A social security number consists of nine digits. How many different social security numbers are possible if repetition of digits is permitted?
4. Math

Social Security Numbers A social security number consists of nine digits. How many different social security numbers are possible if repetition of digits is permitted?
5. Math-New Questions

Social Security Numbers A social security number consists of nine digits. How many different social security numbers are possible if repetition of digits is permitted?
6. Math

1.) A security code has seven characters. Each code begins with two digits, then two letters, and finally three digits. the number of distinct security codes possible if repetition is allowed?
7. math

A typical Social Security number is 555-47-5593. How many Social Security numbers are possible if the first two digits cannot be 0?
8. math

a social security number contains nine digits such as 074-66-7795. how many different social security numbers can be formed?
9. College Mathematics

Counting principles and permutations. A social security number consists of 9 digits. How many different social security numbers are possible if repetition of digits is permitted. digits 0-9
10. Math

A Social Security number has seven digits. How many Social Security numbers are possible?

More Similar Questions