500
You 20 songs on a MP3 player on shuffle. 5 of the songs are by Bruno Mars, 4 are by Rihanna, 7 are by Ed Sheeran, and 4 are by Nick Jonas. If you are already listening to Thinking Out Loud by Ed Sheeran, what is the probability that the next song you will listen to will also be by Ed Sheeran?
What is 6/19.