Home›Decision-making paradoxes›two envelopes problem🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiРусскийفارسیहिन्दी中文日本語EntityQ180191· pop 15· linked from 107 articlestwo envelopes problemAlso known as exchange paradoxbrain teaser, puzzle, or paradox in logic, probability, and recreational mathematicsAvailable in 15 languagesEspañolFrançaisDeutschРусскийItalianoCzechemlHebrewHungarianNederlandsConnectionsparadoxEntityexpectationEntityCategoriesDecision-making paradoxesProbability problemsProbability theory paradoxes