This is just a question I thought of while playing minesweeper. I think that finding the solution might be kind of fun, so I'm sharing it with you guys. If you have no concept of what minesweeper is, this question might be kind of tough. Also, if you have no concept of what minesweeper is go play it. It's fun.
It's an expert board. That means you have a grid of 16 by 30, for a total of 480 squares. A random 99 of these squares have a mine hidden under them.
When you click a square, three things can happen. You can click a mine, resulting in an instant loss. You can click on a square next (diagonal included) to at least one mine, resulting in a number being shown under the square. Or you can click on a square that isn't a mine and isn't next. When this is done, all 8 surrounding squares are revealed. If any of those squares are also not next to any mines, all of the surrounding squares that are not yet revealed become revealed.
That should make sense if you've played minesweeper before.
You're playing expert mode. The mines are spread randomly. What is the average number of squares revealed by your first click?
I would count clicking a mine as 0 squares revealed.
Have fun!