Renae’s cousin, Greg, can get home using the #101 bus or by riding with his older brother. On the way home, Greg can listen to his MP3 player, play video games on his MP3 player, read his novel for English, or talk to the person next to him.

1. Make a tree diagram for all the possible outcomes.

2. What is the probability Greg uses his MP3 player?

   Hint (b):

   Remember that Greg uses his MP3 player for two of the four activities.