Translation:Among my classmates, there are five boys and six girls.
You're obviously absolutely right, yet the fact that Duo's translation is idiomatically flawed, and would probably be idiomatically closer to something like "In my class, there are ... " still remains. The problem here lies in Duo's poor translation, not in the finer details of a more idiomatic attempt at an English translation (like "In my class, there are ... ").
Currently the answers accepted aren't very flexible. "Among my classmates, five of them are boys and six of them are girls" or like others have mentioned, "My class has five boys and six girls" etc are also correct
Answer variations using the numbers '5' and '6' should also be accepted
I wrote " Out of my classmates, five are boys and six are girls." Wasn't accepted and I wasn't surprised. The problem is that in (American) English, we don't use that construction to say how many kids/students there are in a class. "There are 5 boys and 6 girls in my class" sounds most natural. As for the distinction of whether it includes the speaker or not, it normally does and when it doesn't, it's clarified in a different way. No one would say it for that purpose using the duolingo translation of this sentence.
In isolation your definitions are right, but that's not how it's said in Chinese. So we have to stick with 里, but in English we don't say "in my classmates" (as mentioned in other posts, "in my class" isn't the same) - it would have to be "in the group made up of my classmates there are..." which is really wordy, so "among" works best here.
I don't think so. I think that the speaker would probably say "My class has five boys and six girls" (translates to something along the lines of 我班上有五个男孩子，六个女孩子 which I checked on Google Translate) instead or specify that they are included in those numbers. Anyone else have any thoughts?
nothing in the Chinese sentence translates to 'among', plus no native English speaker would phrase it this way. Actually, this English sentence implies that in addition to the 5 boys and 6 girls there are an unspecified number of other beings. Clearly since these comments are almost all 2 years old, no one at DL is reading them