In $class$’s class, there are $nb1$ $cl1$. Knowing that $nb2$ are $cl2$, how many are $cl2$?

To provide the best experiences, we use technologies such as cookies to store and/or access device information. Consenting to these technologies will allow us to process data such as browsing behavior or unique IDs on this site. Failure to consent or withdrawing consent may adversely affect certain features and functions.