A card is drawn at random from a deck of 52 cards. Find the
probability that the card is a seven or a spade.
A bag contains 7 green marbles, 5 blue marbles, and 3 yellow
marbles. If a marble is randomly picked from the bag, find the
probability that it is not blue.
Ten balls labeled with the numbers 1, 2, ..., 10 are in a bin.
What is the probability that the numbers 8, 7, and 2 are...