Statisics and ProbabilitiesPro Problems > Math > Statisics and Probabilities
Featured Pro Problems
Calculate the sum of squares, given the arithmetic, geometric and harmonic means of three numbers
Find the harmonic mean of the roots of a cubic equation
A game of Rock, Paper, Scissors with a strange twist
Find the missing number, based on the difference between the arithmetic mean and the harmonic mean
Pierre numbers his chocolate candies on a scale from one to ten
Slips of paper with digits and letters are drawn from baskets, with 161 possible results
Santa and Mrs. Claus take a Christmas song to extremes - The Twelve Days of Christmas
A probability problem involving randomly selected digits
Understanding Coronavirus Spread
A Question and Answer session with Professor Puzzler about the math behind infection spread.
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