I am pretty sure "the good is mixed with the bad" should also be accepted...is not known if "good" is singular or plural
Is this the complete sentence "The good is mixed with the bad," the noun phrase "the good mixed with the bad," or either?
Complete sentence. The noun phrase would be הטובים שמעורבבים עם הרעים. You can't drop the ש like you can drop the "which are" in English.