Researchers surveyed recent graduates of two different universities about their income. The following two- way table displays data for the sample of graduates who responded to the survey.
How many graduates in the sample had an income of $40,000 and over?
graduates
Income
University A
University B
35
40
Under $20,000
$20,000 to $39,999
$40,000 and over
90
63
35
37

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.