Here is a list of several of tasha’s test scores. find the mean of her scores to the nearest whole number. 50, 45, 75, 80, 80, 62, 66, 73

The "mean" is just the arithmetic average that you are accustomed to whenever finding an average.  It is the sum of all elements divided by the number of elements.

In this case:

m=(50+45+75+80+80+62+66+73)/8

m=531/8

m=66.375

Letter a i would say