$1$
$1$
|$30$|

Fiecare valoare $1$ poate fi scrisa ca
media a cate doua valori din celelalte $4$ posibile.

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|
|

(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