In a certain year, the average monthly income of a person was 3,400. For the first eight months of the year, his average monthly income was 3,160 and for the last five months, it was 4,120. His income in the eighth month of the year was

In a certain year, the average monthly income of a person was 3,400.

1.	In a certain year, the average monthly income of a person was 3,400. For the first eight months of the year, his average monthly income was 3,160 and for the last five months, it was 4,120. His income in the eighth month of the year was
A.	3,160
B.	5,080
C.	15,520
D.	5,520
Answer» C. 15,520

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In a certain year, the average monthly income of a person was 3,400. For the first eight months of the year, his average monthly income was 3,160 and for the last five months, it was 4,120. His income in the eighth month of the year was

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