62%, 25 5 year olds (dern conscience)
And fossten, I think we should give you an extra 5% survivability bonus since I heard you can sing and dance to Thriller:
Yeah, you can always distract zombies by playing Thriller. So if you have a boombox and a CD of Thriller, your chances of survival jump dramatically.
In the event of a Zombie Apocolype, Get a boom box, some batteries and the Thriller CD ASAP!!