Question

What is the “mean” of this number sequence? 4, 2, 2, 2, 5, 15

Answer 1

The answer is 5. 
You add all the numbers together then divide by the amount of number there are.
4+2+2+2+5+15=30 
30/6=5

Answer 2

The mean is found by dividing the sum of all terms by the number of terms present in the set.

Set up the equation:

$\frac{2 + 2 + 2 + 4 +5 + 15}{6} = \frac{30}{6} = 5$

The mean of this sequence is 5.