The mean is the average, which is the sum of all numbers divided by how many numbers there are in total.
We have 22, 39, 39, 43, 46, 75, and 86.
Let's add them all up.
22 + 39 + 39 + 43 + 46 + 75 + 86 = 350
350 is our sum, now we need to count how many numbers we have.
We have 7 numbers in total.
350 / 7 = 50.
Your average is 50.
I hope this helps!