A probability of $\frac{8}{10}$810 means:
an event is certain to occur.
an event is unlikely to occur.
an event is likely to occur.
Which of these events has a probability of $\frac{1}{2}$12?
Which of these events has a probability of about $\frac{1}{100}$1100?
Which of these events has a probability of exactly $\frac{3}{4}$34?