Table: 1983 central american and caribbean championships in athletics
Question: What is the probability that a randomly selected nation from this championship won at least one gold medal?
Step 1 (Operation, Indexing): gold
Step 2 (Operation, Grouping): has gold or not
Step 3 (Reasoning, Grounding): the probability of randomly selected nation, the percentage
Step 4 (Reasoning, Arithmetic): ratio, nations that have gold
Answer: 0.5