Eshaan P. answered 08/20/20
Columbia PhD Student tutoring Math/Econ at college-level and below
The question is a little confusing, but I am guessing it's asking for the probability that the first two songs on the random playlist are reggae. The probability of the first song being reggae is 2/7 since there are 2 reggae songs on the list and 7 total songs. Given that the first song was reggae, the probability that the second song is reggae is 1/6 since there is one remaining reggae song from the remaining 6 total songs. To get the probability that both songs are reggae, you need to multiply: (2/7) * (1/6) = 2/42 = 1/21.