**Mnemonic Device:**

- “Mr. Mean”

**Explanation:** to remember how to calculate the mean (average).

- draw a face:
- ++
- c
- /

**How It Works:** (Mr. Mean never smiles and makes you work)

- start with the eyes – add #’s
- nose – count #’s (how many factors do you have?)
- mouth – divide by that number

**Example:**

- 20 + 30 + 40 = 90
- 3 numbers (factors)
- 90/3 = 30
- 30 is the mean (average)

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