Online Course Discussion Forum
math challenge II-A combinatorics 9.23 Part b)
Yep! That is correct.
Just in case you were unaware, you can also take a look at answer keys here as well: https://classes.areteem.org/static/MCIIASampleSyllabus.html In cases like this, they might have the answer you could check too.
That being said, thanks for pointing out that these were missing in the online system. I've updated this question and 9.22 so they have the final answers, which we do want to have so students can review everything in one place.
社交网络