not good at ms\ath so can you help me

Answer: 20
Step-by-step explanation:
Mean and average of numbers are calculated the same thing
To find the mean, you add up all the numbers and divide them by the number of values there are
In this case, there are 6 values
(14 + 17 + 21 + 28 + 40) / 6 =
120 / 6 =
20