The experiment is given together with event. Determine (modeled) probability of each event, suppose that coins (or dice) are apparent and fair, and that what is seen are faces uppermost.
i) Four coins are tossed; result is at most one tail.
ii) Two dice are rolled; numbers add to 5.
iii) Two dice are rolled; numbers add to 11.
iv) Two dice are rolled; numbers add to 13.
v) Two dice are rolled; both numbers are prime. The positive integer is prime if it is neither 1 nor product of smaller integers.