“A guy walks into a bar…” is a typical form of what has been called the “bar joke.” A math version is:

*“Two random variables were talking in a bar. They thought they were being discrete, but I heard their chatter continuously.”*

The joke was cited on reddit and was first cited on Reddit—Statistics and Twitter on May 7, 2013.

Reddit—Statistics*armchairdetective* May 7, 2013

Not really a joke, but it makes me laugh hysterically:

Two random variables were talking in a bar. They thought they were being discrete but I heard their chatter continuously.

Twitter

Mads

@mitmads

Two random variables were talking in a bar. They thought they were being discrete but I heard their chatter continuously. (from reddit)

11:15 AM - 7 May 2013

Business Insider*13 Jokes That Every Math Geek Will Find Hilarious*

Walter Hickey

May 21, 2013, 5:38 AM

(...)

JOKE #2*Two random variables were talking in a bar. They thought they were being discrete but I heard their chatter continuously.*

Source: armchairdetective / reddit

Explanation: When you roll a die, you either get a 1, 2, 3, 4, 5, or 6. Since there are a finite number of possibilities, the statistic involved is called a *discrete random variable*. When you select any real number from between 0 and 1, there are an infinite number of possible draws. The statistic involved is called a *continuous random variable*.

Twitter

Chetan Mitta

@ChetanReddy

“Two random variables were talking in a bar. They thought they were being discrete but I heard their chatter continuously”- #Reddit #Nerd

8:48 AM - 21 May 2013

Calculus Humor*Random Variables*

8/12/2013

(...)*Explanation:* When you roll a die, you either get a 1, 2, 3, 4, 5, or 6. Since there are a finite number of possibilities, the statistic involved is called a discrete random variable. When you select any real number from between 0 and 1, there are an infinite number of possible draws.

Facebook*Calculus*

November 2, 2015 ·

Two random variables were talking in a bar. They thought they were being discrete but I heard their chatter continuously.

Google Books*Comedy Writing Secrets: The Best-Selling Guide to Writing Funny and Getting Paid for It (Third Edition)*

By Mark Shatz and Mel Helitzer

Blue Ash, OH: Writer’s Digest Books

2016

Pg. 212:

Another safe target is academic subject matter. It’s highly doubtful that the following math jokes will trigger PC alarms.

*Two random variables were talking in a bar. They thought they were being discrete, but I heard their chatter continuously.*

Reddit—Jokes

Two random variables were talking in a bar

submitted August 21, 2016 by Kenzlea

They thought they were being discrete but I heard them continuously.

Oxford Maths

@OxfordEdMaths

Two random variables were talking in a bar. They thought they were being discrete but I heard their chatter continuously #FridayJoke

11:30 AM - 21 Jul 2017

Reddit—Jokes

Two random variables were talking in a bar…

submitted July 30, 2017 by TheHickoryDickoryDoc

They thought they were being discrete, but I could hear their chatter continuously.

New York City • Restaurants/Bars/Coffeehouses/Food Stores • Saturday, April 16, 2016 • Permalink