Respuesta :
To find the mean of a given data set, add up all the values then divide by how many numbers there are.
11 + 16 + 22 + 28 + 29 + 30 + 31 + 34 + 37 + 38 + 43 + 49 + 56 + 78 + 99 = 601
601 / 15 = 40.06666
Round the answer to 40.1 > Choice C is your answer
11 + 16 + 22 + 28 + 29 + 30 + 31 + 34 + 37 + 38 + 43 + 49 + 56 + 78 + 99 = 601
601 / 15 = 40.06666
Round the answer to 40.1 > Choice C is your answer