Brilliant***
Thank you

Mass of the Beaker = 12.023 g
Total Mass of the Beaker and the Ball = 23.050 g
The Mass of the Ball.
Total Mass of the Beaker and the Ball - Mass of the Beaker = Mass of the Ball
23.050 g - 12.023 g = 11.027 g
The Mass of the Ball is 11.027 g