the concept of probability is same in physics or math. quantum phsyics say that the reason the measurement is not exact is not because of the limitation in measurement tools but because it is the way the universe is behaving. no matter what is the reason, then to quantify the universe, probabilistic appraoch is needed. i don't see any difference in probability used in math or probability used in physics except taht i might pick up a bad example. :) from a KNIGHT TEMPLER