Posted by **Jassie** on Wednesday, April 4, 2012 at 11:43am.

How many codes consisting of a letter followed by 3 digits can be made if no digit can be used more than once?

- Math -
**bobpursley**, Wednesday, April 4, 2012 at 12:27pm
26*10*9*8

This assumes the letter "O" is allowed. Often it is not, because of confusion with zero. IT also assumes case of the letters is indifferent. If case masters, then A and a will be different, so you double the number of codes available.

- Math -
**Jassie**, Wednesday, April 4, 2012 at 4:37pm
can you tell me how you got 9 and 8?

I get it 26 alphabets.

10 digits.

## Answer this Question

## Related Questions

- probability - you are to set up a code of consisting of three letters (A to Z) ...
- math - please i need help with this...were studying probability...possible ...
- algebra - In Utah, a license plate consists of 3 digits followed by 3 letters. ...
- math30 - A security code used to consist of two odd digits, followed by four ...
- math - Any of the ten digits 0 through 9 may be used in a 6-digit code, but no ...
- math - If a bar code contains a letter followed by a digit from 1 to 9 followed ...
- math - using digits 1-9 only once, multiply a 3 digit by a 2 digit number and ...
- MATH ( PROBABILITY) - Security codes in Fiji are made up of 4 digits. How many ...
- Math110 - how many 6 - slots codes can be made up using 2 letters followed by 2 ...
- st130 - security codes in fiji are made up of 4 digits. how many different 4 ...

More Related Questions