Problem of the Week 1020
A Pandigital Puzzle
Let p(n) be the probability that a random n-digit integer has all 10 digits occurring (where for simplicity we do include leading 0s; that is, we consider 0000012345 as being a 10-digit number). So p(9) is 0 and
What is the smallest n for which p(n) > 1/2?
Suggested by Danny Lichtblau, Wolfram Research, Inc.
© Copyright 2004 Stan Wagon. Reproduced with permission.