A coin is tossed twice.
Construct a tree diagram to identify the sample space of tossing a coin twice.
Use the tree diagram to find the probability of getting two tails.
Use the tree diagram to find the probability of getting at least one tail.
One card is drawn at random from a standard deck of cards. What is the probability that the card is:
A three-digit number is to be formed from the digits $4$4, $5$5 and $9$9, where the digits cannot be repeated.
Ivan rolled a standard die and then tossed a coin.