Over the past month, the 500 customers have downloaded the
following number of songs from WalMart’s website (obviously, they
have had more, but we need to use workable numbers): 146 customers
downloaded 2 songs, 94 customers downloaded 4 songs, 189 downloaded
9 songs, and the remaining customers downloaded 11 songs. What is
the average number of songs downloaded by a customer? (please round
your answer to 2 decimal places)