Mean Test Score Calculation

A researcher is analyzing the test scores of a group of students who took an advanced mathematics exam. The scores are as follows: 72, 85, 89, 94, 76, 88, 92, 78, 95, 90.

To summarize the performance of the students, the researcher calculates the mean (average) score and the standard deviation of these test scores. What is the mean test score of this group of students, calculated to two decimal places?