# [SOLVED]Permutation question

#### Raerin

##### Member
It's a permutation question, so I don't know where else to post this.

How many eight digit even numbers are possible with the digits 7 5 4 5 7 5 0 7?

Please explain step by step.

#### Klaas van Aarsen

##### MHB Seeker
Staff member
It's a permutation question, so I don't know where else to post this.

How many eight digit even numbers are possible with the digits 7 5 4 5 7 5 0 7?

Please explain step by step.
Welcome to MHB Raerin!

Can you give an indication what you have tried or considered?
That helps us to understand how we can best help you.
Can you for instance give a couple of examples of numbers that satisfy the criteria?

#### shriver99

##### New member
Just to get you started, with questions asking 'how many ways?' it's often a help to take one digit at a time (first, second, third....)

For the first digit, would you agree it can only be a 7, 5 or 4? If it were a zero, this would not be an eight digit number. So, there are 3 combinations of the first digit.

Can you see now how to work toward a solution?