human
In a graduation ceremony, each graduate can bring their 2 parents. Twenty teachers and half as many administrators will also attend the graduation ceremony. If there are 50 graduates, how many chairs must be prepared for the ceremony?
assistant
How many parents are expected to attend? ** There will be 50 x 2 = <<50*2=100>>100 parents that are expected to attend.
How many administrators will attend? ** 20/2 = <<20/2=10>>10 administrators will attend.
How many chairs must be prepared? ** Hence, 50 graduates + 100 parents + 20 teachers + 10 administrators = 180 chairs must be prepared.
#### 180