Text: 76.43, reason: 82.65. According to the query of Hunan Education Examinations Institute, the average score of mathematics and science in Hunan college entrance examination in 20 13 years was 76.43 and 82.65 respectively. The average score refers to the number obtained by dividing the sum of a set of data by the number of the set of data. In mathematical language, it is the result of calculating the arithmetic average of a set of data.