"You are right; Finland is not in Scandinavia."
Translation:Olet oikeassa; Suomi ei ole Skandinaviassa.
Just check your sentence for other errors and if you can't find any, hit the "report" button. > "My answer should be accepted." That is how Duo expands its database.
Fun fact: in some of the older courses, there are literally tens of thousands of accepted translations for some of the longer, more complex sentences.