h2. Exemplu
table(example). |_. medie.in |_. medie.out |_. Explicatie|

| $5$

|$5$

$1$
$1$
$1$
$1$
$1$

| $30$ |

|$30$|

Fiecare valoare $1$ poate fi scrisa ca
media a cate doua valori din celelalte $4$ posibile.
Se vor numara tripletele:

( $1$, $2$, $3$), ( $1$, $2$, $4$), ( $1$, $2$, $5$), ( $1$, $3$, $4$), ( $1$, $3$, $5$),
( $1$, $4$, $5$), ( $2$, $1$, $3$), ( $2$, $1$, $4$), ( $2$, $1$, $5$), ( $2$, $3$, $4$),
( $2$, $3$, $5$), ( $2$, $4$, $5$), ( $3$, $1$, $2$), ( $3$, $1$, $4$), ( $3$, $1$, $5$), etc|
| $3$

($1$, $2$, $3$), ($1$, $2$, $4$), ($1$, $2$, $5$), ($1$, $3$, $4$), ($1$, $3$, $5$),
($1$, $4$, $5$), ($2$, $1$, $3$), ($2$, $1$, $4$), ($2$, $1$, $5$), ($2$, $3$, $4$),
($2$, $3$, $5$), ($2$, $4$, $5$), ($3$, $1$, $2$), ($3$, $1$, $4$), ($3$, $1$, $5$), etc|
|
$3$

$4$
$2$
$1$

Valoarea 1 nu este media aritmetica a valorilor 4 si 2.
|
|$6$

 $3$
 $1$
 $6$
 $4$
 $5$
 $2$

$3$
$1$
$6$
$4$
$5$
$2$

|$6$
|2=(1+3)/2
3=(4+2)/2; (1+5)/2