Answer: y = 2
Step-by-step explanation:
Alice receives 9 out of the 24 pens.
What is your tabletop asking us today?
Answer: 6 students
What we know:
Students: 24
Students who play checkers: 
Students who also play sudoku:
of the 
24 ÷ 3 = 8, so 8 × 2 = 16 (students who play checkers)
× 2 = 
So the answer is,
6 students play both checkers and sudoku