Futilisoft has begun work on a new product. This product calculates the probability (as an integer percentage) of winning the Powerball for any given set of numbers.

Powerball[10] is a lottery in the United States. It involves drawing five white balls and one red ball, sometimes called the “power ball”.

The company has assigned two developers to work on this new project, Harry, located in Birmingham, England, and Sally, located in Birmingham, Alabama. Both developers are telecommuting to the Futilisoft corporate headquarters in Cleveland. After a bit of discussion, they have decided to implement their product as a command-line app in C and to use Apache Subversion^[11] 1.6.15 for version control.