The table shows the difference in bag production at a factory between the production number of that day and that of the

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[GMAT math practice question]

The table shows the difference in bag production at a factory between the production number of that day and that of the previous day. A positive number means the number of bags produced on that day is greater than the previous day. A negative number means the number of bags produced that day is less than the previous day. The production number on the 12th day is 42,000. How many bags were produced on the 8th day?
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A. 41400
B. 41700
C. 41900
D. 42300
E. 42500
Source: — Problem Solving |

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The number of bags produced on the 11th day is 42,000 + 300 = 42,300.
The number of bags produced on the 10th day is 42,300 - 400 = 41,900.
The number of bags produced on the 9th day is 41,900 - 500 = 41,400.
The number of bags produced on the 8th day is 41,400 + 300 = 41,700.

Therefore, B is the correct answer.
Answer: B