# What is the mean of the sequence ?

#### math 2019

##### New member
[2,5,7,3,3}
What is the mean of this sequence , help me please because it is my first time doing it today and I'm a bit confused .
Thanks

#### MarkFL

##### Super Moderator
Staff member
Is that exactly how the problem was presented to you?

yes

#### MarkFL

##### Super Moderator
Staff member
Well, if you are to find the arithmetic mean (average) of that set of values, then add them up, and divide the resulting sum by the number of elements.

#### math 2019

##### New member
You as perfect as always , million thanks

#### math 2019

##### New member
I can't get the mean of this set
[1,2,3,8,7}
I got 21 ,when I added it up and there is 5 elements in the set .
Should you just right 4.2 or is that wrong?

#### MarkFL

##### Super Moderator
Staff member
Yes, you could write:

$$\displaystyle \overline{x}=4.2$$

or:

$$\displaystyle \overline{x}=\frac{21}{5}$$