Here's a breakdown:
* EU Official Languages: The European Union has 24 official languages: Bulgarian, Croatian, Czech, Danish, Dutch, English, Estonian, Finnish, French, German, Greek, Hungarian, Irish, Italian, Latvian, Lithuanian, Maltese, Polish, Portuguese, Romanian, Slovak, Slovenian, Spanish, and Swedish.
* Council of Europe Languages: The Council of Europe, which is a different organization from the EU, has 47 member states and recognizes 50 languages as official languages: Albanian, Armenian, Basque, Belarusian, Bosnian, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, English, Estonian, Faroese, Finnish, French, Georgian, German, Greek, Hungarian, Icelandic, Irish, Italian, Latvian, Lithuanian, Macedonian, Maltese, Moldovan, Norwegian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swedish, Turkish, Ukrainian, and Welsh.
* Individual Countries: Each country in Europe has its own official language(s). For example, France's official language is French, while Switzerland has four official languages: German, French, Italian, and Romansh.
Therefore, to answer your question completely, you need to specify which part of Europe you're referring to - the EU, the Council of Europe, or a specific country.