Consider me tossing a coin and I got tail as a result on observing it. Then, what would be the result of the 'parallel me' in another universe? If the 'parallel me' gets head as a result then, considering all the parallel universes the probability of occurrence of any event would be 1! In that case the whole concept of probability (considering all the parallel universes) goes wrong. What's your opinion about this or am I thinking in the wrong way?
(I actually asked this question while participating in 'I'm a Scientist get Me Out of Here' but I would also like the views of Physics SE members.)