My understanding of probabilities in many worlds is following:
If I would decide to start smoking and we know that 10% of smokers get cancer that means that in 10% of all worlds during my lifetime I would get cancer (assuming I would smoke average and I am genetically average to get cancer and average in every way).
or another example:
If I would decide to start building parachute jumping and we know that 5% of building parachute jumpers die in the process that means that in 5% of all worlds where I made such decision I would die from jumping (assuming I am average jumper and average in every way)
Edit: To some this question seems to be confusing. I used examples since I am not a physicist, and when one is using technical language what he does not understand the outcome usually is pathetic.
@count_to_10 has linked to Many world interpretation and I can confirm that this is exactly what I am talking about. Question rephrased in technical language would be:
If some event (like a toss of a dice has chance of 16.(6)% to roll 6) does that mean that 16.6% of world branches (on average) will get 6 rolled? Same thing with cancer example would there be 10% of world branches that one would get cancer?
Do many world probabilities can be understood in such a way or they are something completely different? If not how should I understand them?