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[kwaka_crasher]

Lets pretend there's 100 motorcycle accidents.

According to the figures given, 67 of them would be a multi vehicle accident.

Therefore the 33 others are the motorcyclists fault.

Of the 67 multi vehicle accidents 62% of them are the fault of the other vehicle i.e. approx. 42 of them.

Therefore the 25 others are the motorcyclists fault.

33 + 25 = 58

Sorry. You are correct. Here's where I went wrong (I blame the Janola fumes headache I have ATM from washing down inside the boat this morning).

No. 62/100 x 67/100 is 42/100 so 42% of multi-vehicle accidents are the riders primary responsibility.

I then promptly forgot that's 42% of 67% of all crashes. I fell into the exact trap I was accusing you of.

It should have been (((67/100)*62/100)*62/100)=25% to determine the rider fault proportion of multivehicle crashes for ALL accidents.

So 58% is correct.

[Ixion]

over 140,000 votes haha...

Gosh, a lot of people voted , didn't they. Must be a very hot topic.

[CDFloss]

Lets pretend there's 100 motorcycle accidents.

According to the figures given, 67 of them would be a multi vehicle accident.

Therefore the 33 others are the motorcyclists fault...

Don't you mean the 33 others are single vehicle accidents? If you're dishing out fault then there's no way to say that those 33 are the biker's fault - the same way a car vs cow, or car vs black-ice isn't the car's fault. Never mind that this is a "no fault" system (or was that the problem in the first place, I forget)