Answer:
Step-by-step explanation:
Given that,
The ratio of chair to table is 12:7
C:T=12:7
Total ratio = 12+7 =19
Chair ratio =12
Table ratio =7
If there are 84chairs
Then,
Number of chairs=chair ratio / total ratio × total number of chair and table.
Let total number of chair and table be y
84=12/19 × y
84=12y/19
84×19=12y
y=84×19/12
y=133 chairs and tables
Chairs + table = total chair and table
84+table=133
Table=133-84
Table =49
Therefore there are 49 tables
Alternatively,
Number of table=table ratio / total ratio × total number of chair and table.
Table=7/19 × 133
Table=931/19
Table=49
So there are 49 tables in the restaurant
