<p>Fifty percent of the songs played on a certain radio station are 3 minutes long, 30 percent are 5 minutes long, and 20 percent are 2 minutes long. What is the average number of minutes per song played on this radio station?</p>
<p>[(50x3)+(30x5)+(20x2)]/100=3.4</p>
<p>total minutes over the total number of songs. Easiest to just make it 100 songs for obvious reasons.</p>