Final answer:
A graphical representation useful for visualizing multiple-step experiments is known as a tree diagram. It displays possible outcomes of an experiment with branches and is particularly helpful in solving complex probability questions. Another related tool is the Venn diagram, which visualizes set relationships and events.
Step-by-step explanation:
A graphical representation that assists in visualizing a multiple-step experiment is often referred to as a tree diagram. A tree diagram is a visual tool used to enumerate and categorize all possible outcomes of an experiment, especially when it involves sequential steps or stages. Each 'branch' of the diagram represents a different possible outcome or decision point, making complex probability questions easier to manage and understand.
For example, if an experiment consists of drawing balls from an urn where there are 3 red balls and 8 blue balls, and we draw two balls, one after another, replacing each ball before drawing the next, a tree diagram can be effectively used to display all potential outcomes and their related probabilities.
Another popular graphical representation used in similar contexts is the Venn diagram. Particularly useful when dealing with sets and probabilities, a Venn diagram uses circles within a universal set to represent different events and helps visualize relationships like intersection (AND) and union (OR).