Answer:
There are 84 blue chairs.
Step-by-step explanation:
There are 6 rows with 18 chairs in each row.
So, total number of chairs =
In the centre of the chairs, 4 rows of 6 chairs are brown.
So, number of brown chairs =
The rest of the chairs are blue.
Hence, subtracting number of brown chairs from total number of chairs will give the number of blue chairs.
So, number of blue chairs =