World Population and Four Dice (Math Chat)
Library Home || Full Table of Contents || Library Help
|Frank Morgan; Christian Science Monitor|
|Answers to the old challenge (Estimate what fraction of the people who have ever lived on Earth are alive on Earth today.) plus a new challenge and an additional problem and answer (courtesy S. H. Logue: Ann learned that her old dot-matrix printer can create many graphics characters, each composed of any combination of 96 dots in a small rectangle 8 dots high by 12 dots wide. Ann decides to print out one of every possible character pattern, ranging from all-dots- white to all-dots-black, on a long tape, 10 patterns per inch. How long is the finished tape?).|
|Levels:||Middle School (6-8), High School (9-12)|
|Resource Types:||Problems/Puzzles, Articles|
|Math Topics:||Estimation, Permutations/Combinations, Population|
© 1994- The Math Forum at NCTM. All rights reserved.