New probability puzzle from columnist John Allen Paulos. Oct. 3, 2010 — -- During my summer hiatus from Who's Counting, a fascinating new paradox, first noticed by puzzle-meister Gary Foshee, ...

An animated guide to probability explains how to express probability as fractions and percentages based on the ratio of the number of ways an outcome can happen and the total number of outcomes.

P = normal allele close alleleOne of a number of forms of a particular gene. The probability of the offspring being PP is 25%. The probability of the offspring being Pp is 50%. The probability of the ...