Final answer:
The error in Ben's equation is not mentioned, but the correct equation for finding 'r' is explained with an example.
Step-by-step explanation:
The error in Ben's equation for finding r is not mentioned in the question. However, I can provide you with the correct equation based on the information given. To find r, we need to have information about the number of representatives attending from each country or territory. Let's represent this number as x. The correct equation would be:
r = x / (total number of countries or territories)
For example, if there are 10 countries or territories and the number of representatives attending from one country is 2, the equation would be:
r = 2 / 10 = 0.2