Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 294

Quick question, how can someone find the numbers composing an average ?

Ex : I have ---

x = 480

___ = 60

8

I want to find the 8 numbers composing the average ? How is that done ? thanks

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 86,636

Hi;

What you are asking is not possible. You are asking for 8 numbers that sum to 480. There are an infinite number of such groups of 8. You must put some constraints on those numbers to solve the problem.

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 294

Here the whole exercise : I have 8 number , the average is 60 , and the average difference(not sure how to name this in english) is 4... I have no idea on how to do this ?

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 86,636

Hi;

These are one possibilty:

46 50 54 58 62 66 70 74

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

Offline

**hammana****Member**- Registered: 2012-03-02
- Posts: 48

probably what you call "average difference" should be "standard deviation". What is the word used in the original text of the exsercise?

Offline