Final answer:
The probability of the same song being played twice in a row is 1 or 100%.
Step-by-step explanation:
To find the probability of the same song being played twice in a row, we need to calculate the probability of any song being played twice and then multiply it by the number of songs.
The probability of any song being played twice in a row is 1/16, because there are 16 songs in the playlist and any one of them could be the repeated song.
Therefore, the probability of the same song being played twice in a row is (1/16) * 16 = 1.
So, the probability is 1 or 100%.