When is it necessary to show all of the possible outcomes of an experiment by using a tree diagram and when is using the Fundamental Counting Principle sufficient?

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

The holiday party will cost $160 if 8 people attend. if there are 40 people who attend the party, how much will the holiday party cost

Suppose you just purchased a digital music player and have put 8 tracks on it. after listening to them you decide that you like 4 of the songs. with the random feature on your player, each of the 8 songs is played once in random order. find the probability that among the first two songs played (a) you like both of them. would this be unusual? (b) you like neither of them. (c) you like exactly one of them. (d) redo () if a song can be replayed before all 8 songs are played.