Question 1178645
<pre>
If the order in which she sings them doesn't matter, then it's

7 songs CHOOSE 3 = 7C3 = [(7)(6)(5)]/{(3)(2)(1)] = 35 ways.

If the order in which she sings them matters, then it's

7 songs POSITION 3 = 7P3 = (7)(6)(5) = 210 ways.

Edwin</pre>