Darth Monkey
hhhmmmm if Y equals me and X equals how many people are in the area and N is the number of barrels of gasoline that are wired to explode....what will be the fatality rate?
There's a couple issues that you haven't taken into account. X needs to be broken down to represent their distribution over the area. For instance, those at a further distance may only suffer third degree burns. Also, since the whole 'barrels rigged with wire' contraption would be fairly recognizable as an armed explosive, you have to take into consideration the possibility that it will be discovered. In the event of discovery how quickly will panic ensue and at what rate will people flee the area? The location of the explosives would play an important part of this as well. If it's in a nursing home it would be reasonable to assume that even if the explosives were discovered there wouldn't be enough time for at least some of the elderly to scurry away.
One last thing, you have to take into account whether you, Y, happen to be standing on top of the barrels. If that's the case add one to whatever calculation you manage to come up with.