Mean Median or Mode
What is 5!
120
What 0!
1
What is 7P2
42
A password is made using 4-digit codes. The first digit has to be a vowel. How many possible combinations are there?
5000
In Jamaica we have what is called a tax registration number, similar a social security number in the US. There are 13 digits in this number however all must end with 900. How many possible combinations are there?
100000000001