Ava Ethan Jacob and Samantha are cousins. One of them is 10 years old, one of them is 20 years old, one of them is 30 years old and the other one is 40. The sum of Ava's age and Ethan's age is 50. The sum of Ethan, Jacob and Samantha's age is 60. If Samantha is older than Jacob, how old is Samantha

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.