A mixed collection is an ASSORTMENT of items that are different from each other. It is a term used to describe a variety of items that have been gathered together, often for a specific purpose. An example of a mixed collection could be a box of toys, which contains a variety of different types of toys such as dolls, cars, and action figures. Another example could be a collection of books, which includes a range of genres such as fiction, non-fiction, and poetry.