Answer:
About 276,500 country A students studied abroad during the 2012-2013 school year.
Explanation:
Given that in the 2012-2013 school year, approximately 790,000 foreign students studied in country A, and the number of country A students who studied abroad that same year was about seven-twentieths of the number of foreign students who studied in the country A, to find the number of country A students who studied abroad during the 2012-2013 school year, the following calculation must be performed:
790,000 x (7/20) = X
790,000 x 0.35 = X
276,500 = X
Therefore, about 276,500 country A students studied abroad during the 2012-2013 school year.