Does the LEGO (online) store ensure customers do not get repeated models in character packs? I have ordered ten of the LEGO Super Mario character packs from the LEGO store online.
I would expect that the models in these packs to be distributed randomly, i.e. each pack has a 1-in-10 chance to include each of the ten models. However, having opened eight of the ten packs, I have received eight distinct models (I am only missing the bullet-bill and the Fuzzy).
The chances of this happening by random chance are small - I'm not 100% sure on the mathematics, but I think its about 1,8%.
Does anyone know if the (online) LEGO store systematically tries to make sure customers do not get repeats in random packs?
I think I can answer this question myself now.
I have ordered twice, ordering five character packs in each. Across each of the sets of five, all of the characters I received were unique. However, there were two models in common between the two sets of five.
As zovits and Phil B. suggested in comments, it looks like employees will simply grab the next packs you have ordered form the box. Inside the box the packs seem to be ordered, so it is very likely that you'll end up getting unique models, but not assured.
If you would like all ten models, and can afford it, order ten packs at once.