a math Qwestion

[kedaman]

ok, there goes a bus every 10'th minute, usually between xx:x2 and xx:x6. That depends on how many people there's on the bus which depends on what time it is, i'm not going into that part now. It takes about 2-3 minutes from my house to the bus stop so i usually leave at xx:00. What happens is that (this happens usually) the bus just goes off when i rush to busstop so i have to wait another 10 minutes. But the problem is that it usually get's to about 12 minutes because each even bus usually is late and each odd is early.

So i did some statistics on this and the result shows that i have to wait about 7 minutes, which is more than 5 minutes(10/2).
Now if i did new tests again walking to the busstop without looking at the clock first, what would the results be?

[Arbiter]

You'd be so determined not to look at the clock, you'd fall down an open manhole cover.

The bus would then drive over you just as you're climbing out.

The bus would be on time...