Kachapova, FKachapov, I2013-06-072013-06-072011-12-162011-12-16International Journal of Mathematical Education in Science and Technology, Vol. 43 (7), pp.963-971.1464-5211https://hdl.handle.net/10292/5427This article describes some misconceptions about random variables and related counter-examples, and makes suggestions about teaching initial topics on random variables in general form instead of doing it separately for discrete and continuous cases. The focus is on post-calculus probability courses.Copyright © 2012 Taylor & Francis. This is a preprint of an article whose final and definitive form has been published in the International Journal of Mathematical Education in Science and Technology and is available online at: www.tandfonline.com with the open URL of your article (see Publisher’s Version).MisconceptionCounter-exampleMixed random variableSingular random variableRiemann–Stieltjes integralExpected valueJournal ArticleOpenAccess10.1080/0020739X.2011.644332