Answer:
[tex]171\ balloons[/tex]
Step-by-step explanation:
Balloons on 1 tree:
[tex]Blue=9\\Yellow=4\\Red=6\\Total\ balloons\ on\ 1\ tree=Blue+Yelloe+Red=9+4+6=19[/tex]
Total Balloons:
[tex]Total\ number\ of\ tree=9\\\\Total\ balloons=balloons\ on\ 1\ tree\times total\ number\ of\ tree\\\\Total\ balloons=19\times 9=171[/tex]