Question

A fan of country music plans to make a custom cd with 11 of her 27 favorite songs. how many different combinations of 11 songs are​ possible? is it practical to make a different cd for each possible​ combination?

Answer 1

This is equivalent to asking in how many ways you can choose 11 from an available 28 and is hence the combination

28^Cv11=28!

(28−11)!11!

=21474180