# How do you find the arithmetic means of the sequence 55, __, __, __, 115?

##### 1 Answer

Jan 6, 2017

Arithmetic Mean =

#### Explanation:

Suppose the common difference is

Then the first 5 terms are

[1]

[2]

[3]

[4]

[5]

Since

The arithmetic means (average) of an arithmetic sequence with an odd number of terms is the value of the middle term.

In this case,