This isn't too bad of a problem!
First off, we have to find how many numbers between 1 and 1000 are divible by 5.
It might seem challenging, but what it really is is just 1000/5 = 200!
Now, there are 1000 numbers between 1 and 1000, so we just have 200/1000, which gets us 1/5.
So there is just a 1/5 chance that there will be an integer divisble by 5!
Thanks! :)