Answer:
D. 8 to 1
Explanation:
To find the ratio of chairs to tables, we can divide the number of chairs by the number of tables:
Ratio of chairs to tables = Number of chairs / Number of tables
Ratio of chairs to tables = 160 / 20
Ratio of chairs to tables = 8
Therefore, the ratio of chairs to tables in the cafeteria is 8 to 1, which is option D.