let
NomTable = Table.FirstValue(Excel.CurrentWorkbook(){[Name="ND_Choix"]}[Content]),
Source = Excel.CurrentWorkbook(){[Name=NomTable]}[Content],
#"Type modifié" = Table.TransformColumnTypes(Source,{{"Nom", type text}, {"Prenom", type text}, {"Age", Int64.Type}})
in
#"Type modifié"