Note that what you are asking is NOT "uncertainty", a word in which, in QM, automatically means the Heisenberg Uncertainty Principle (HUP). What you are asking is the apparent "measurement problem" of QM in which a definite outcome appears out of a superposition of many different outcomes.

You may want to do a search on PF on "Schrodinger Cat", "superposition", etc. I know for a fact that I have written several responses on why QM's "randomness" is NOT the same as a coin-tossing randomness.