To delete/uninstall an application purchased or otherwise installed on Xoom device, There are many methods to do that.
Delete apps From the Settings Menu
1. In the top right corner of the screen, touch "APPS".
2. Touch Settings > Applications > Manage Applications.
3. Select the app and touch "Uninstall".
Remove apps From the Application Tray
1. In the upper right corner of the display, Touch "Apps" and choose the app you want to uninstall.
2. Touch & Hold the application icon, and then you will see "Uninstall" coming up in the top right corner of the display.
3. Now drag & drop it to the Uninstall trash can.