65.69 points. According to Sohu's query. Com, 20 19, the national average score of a true problem of mathematics for postgraduate entrance examination is 65.69, and the difficulty coefficient is 0.438. In addition, the second average score of mathematics is 7 1.87, and the difficulty coefficient is 0.479. The average score of mathematics is 76.80, and the difficulty coefficient is 0.5 12.