How many more first-time jobless claim were filed in week P than in week T?

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Source: GMAT Prep

How many more first-time jobless claims were filed in week P than in week T?

1) For weeks P, Q, R, and S, the average (arithmetic mean) number of first-time jobless claims filed was 388,250.

2) For weeks Q, R, S, and S, the average (arithmetic mean) number of first-time jobless claims filed was 383,000.

The OA is C
Source: — Data Sufficiency |