Setting random parts in the advanced feeder

I have an advanced feeder that has been set up to give out three different parts randomly. Can I set this up so that after 50 parts the same distribution is coming out? I.e 25 cans, 15 bottles, 10 PET bottles? This has to be random, but after any fifty components the same distribution must occur.

I have played around with the advanced feeder distribution book, but it doesn’t make a difference.

Any help would be much appreciated.