How to simulate races on excel

[Jimbob76]

Since my current formula is completely broken and produces stupid results on a regular basis (Nakano winning in Australia, Fisichella winning in Australia, a Vettel-Sato-Bourdias Podium, Button on Pole, Nakajima on Pole) can someone help me have a better method of simming races.

[Bosco444]

What formula did you use?