You must guess the proportion of balls of each color that are in each urn. We do not know the number of balls or how many colors there are. To guess the composition you have to make extractions and write down what has come out and see what relationship there is between them: if there is the same number, one doubles the other,....From here and calculating the proportion, estimate the theoretical probability.

- Extractions are made and the results are noted[br]- When we believe that we can deduce the probability, write it on the sheet[br]- We repeat the process with other urns[br]- We collect information from other students or groups