Since this graph is symmetrical across a certain x value, we just need to find the x value of the vertex (the x value where the axis of symmetry passes through) to get the mean of the data.
The values greater and less than the x value of the vertex will average out to the x value of the vertex since the graph is symmetrical.
The x value of the vertex is 50.
Thus, the mean of this data set is 50.
Have an awesome day! :)
