Final answer:
The experimental probability that a randomly chosen representative is from the South region is 1/4.
Step-by-step explanation:
The question asks for the experimental probability that a randomly chosen representative is from the South region, based on the given bar graph. To find this probability, you need to calculate the ratio of representatives from the South region to the total number of representatives.
According to the bar graph, the South region has 3 representatives out of a total of 12 representatives. Therefore, the experimental probability is 3/12, which simplifies to 1/4.