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At the end of the third grade math book.
Total score of three courses =(94x2+88X2+90X2)/2=272.

The average score of Chinese and mathematics is 94, and the total score is 94x2= 188.

English score = total score of three subjects-total score of Chinese and mathematics =272- 188=84.

The average score of mathematics and foreign languages is 88, and the total score is 88x2= 176.

Chinese score = total score of three subjects-total score of foreign language and mathematics =272- 176=96.

The average score of foreign language and Chinese is 90, and the total score is 90x2= 180.

Math score = total score of three subjects-total score of foreign languages =272- 180=92.