Question

Dintr-o urna in care se afla bile numerotate de la 1 la 10 scoatem 2 bile . Ce numere pot avea bilele scoase ? Scrie cateva solutii posibile.

Answer 1

1-2
1-3
1-4
1-5
1-6
1-7
1-8
1-9
1-10
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-10
3-4
3-5
3-6
3-7
3-8
3-9
3-10
4-5
4-6
4-7
4-8
4-9
4-10
5-6
5-7
5-8
5-9
5-10
6-7
6-8
6-9
6-10
7-8
7-9
7-10
8-9
8-10
9-10
Cred ca sunt toate posibilitatile