There will be 50 x 2 = <<50*2=100>>100 parents that are expected to attend.

20/2 = <<20/2=10>>10 administrators will attend.

Hence, 50 graduates + 100 parents + 20 teachers + 10 administrators = 180 chairs must be prepared.

# Answer

180
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
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?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
180
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?
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