Three-level mathematical statistics: According to the statistics released by Beijing Municipal Bureau of Statistics in February 201February, the total import and export volume of Beijing Customs during the Eleventh Five-Year Plan period was related. The above figure shows the relationship between the total import and export volume in each year, and 26, 22, 4 1 is the percentage of the growth rate. The specific calculation method is:

(last year's import volume+last year's export volume) ×( 1+ growth rate/100)= (last year's import volume+last year's export volume)

The figure below shows the annual import volume and export volume.

Therefore, according to the import and export volume in 2009, the growth rate in 20 10 and the export volume in 20 10, the import volume in 20 10 can be calculated:

(import in 2009+export in 2009) ×( 1+20 10 growth rate/100)=(20 10 import +20 10 export).

The substitution of specific data is:

( 1664+484)×( 1+40/ 100)=(x+555)

Solve x=2452