The number of different possible line ups are; 4,233,600
We are told that;
List of songs = 11 songs
Number of songs to be selected = 4 songs
Thus, the number of different possible line ups is gotten from permutation formula as;
¹¹P₇ = 11 * 10 * 9 * 8 * 7 * 6 * 5 * 4 = 4,233,600
Read more about permutations at; https://brainly.com/question/12468032