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[http://wordplay.blogs.nytimes.com/2014/03/24/urn/ A large urn]<br> | [http://wordplay.blogs.nytimes.com/2014/03/24/urn/ A large urn]<br> | ||
by Gary Antonik, Numberplay blog, ''New York Times'', 24 March 2014 | by Gary Antonik, Numberplay blog, ''New York Times'', 24 March 2014 | ||
<blockquote> | |||
There are 600 black marbles and 400 white marbles mixed well in a large urn. You draw marbles one by one at random without replacement until you take out all the marbles of one of the colors. What is the probability that at least one white marble will be left in the urn? | |||
<br<Br> | |||
Bonus: On average, how many marbles will be left in the urn? | |||
</blockquote> | |||
Submitted by Bill Peterson | Submitted by Bill Peterson | ||
Revision as of 01:13, 26 March 2014
March bracket madness
Mathematicians are hoping their calculations add up to the perfect bracket
by Mary Pilon, New York Times, 15 March 2014
In N.C.A.A. tournament bracket, mathematician outdoes Matildas
by Joe Drape, New York Times, 24 March 2014
Two alcohol graphics
Tell me what you drink, and I’ll tell you how you’ll vote
by Beppi Crosariol, The Globe and Mail, 14 January 2014
Includes the following chart, entitled What Americans drink and how they vote
A pair of probability puzzles
A large urn
by Gary Antonik, Numberplay blog, New York Times, 24 March 2014
There are 600 black marbles and 400 white marbles mixed well in a large urn. You draw marbles one by one at random without replacement until you take out all the marbles of one of the colors. What is the probability that at least one white marble will be left in the urn? <br
Bonus: On average, how many marbles will be left in the urn?
Submitted by Bill Peterson