Answer:  2127 chairs 
Explanation:
Given : Carrie manages a catering company. She rented 325 chairs each week for the first two weeks of May. 
Then by using Multiplication operation , the total number of chairs ordered in first two weeks of May. = 
 (1)
 (1)
Also, Carrie rented 750 chairs each week for the first two weeks of April. 
Then, the total number of chairs ordered in first two weeks of April = 
 (2)
 (2)
Total chairs ordered in 4 weeks = 650+1500 [add (1) and (2)]
 =2150
The chair rental company forgot to send 23 chairs, then number of chairs received by Carrie = 2150-23 =2127
Hence, Carrie received 2127 chairs in those 4 weeks.