Question

A credit card company requires that its customers choose a 3 digit, numerical code to access their online account. Each digit should be chosen from 012345678 or 9. So there are 10 possibilities for each digit. How many different three digit codes are there?

Answer 1

Given :

A credit card company requires that its customers choose a 3 digit.

Each digit should be chosen from 0, 1, 2, 3, 4, 5, 6, 7, 8 or 9.

So there are 10 possibilities for each digit.

To Find :

How many different three digit codes are there.

Solution :

We know, possibility of choosing each digit is 10.

So, total number of three digit codes are :

`T=10* 10* 10\\\\T=1000`

Therefore, their are 1000 different three digit codes.

Hence, this is the required solution.