The answer is 85.3
To find the mean, also known as the average of a set of numbers, you add all the numbers up in the sequence. Then you divide the sum of the numbers by how many numbers there are in the sequence. In this case, the numbers added together equal 853. 853 divided by 10, the amount of numbers in the sequence, is 85.3.
12+74+74+3+7+2+2+2+673+4=853
853/10=85.3