# Question #be5e0

##### 1 Answer

Apr 2, 2017

#### Explanation:

Recall that **Arithmetic Mean** (AM) of

We are given the following set of nos. :

To find, how many these nos. are, we observe their patern :

By the **Formula** for **Sum** of **Arith. Seq.,**

we get,

**Enjoy Maths.!**