Respostas

2014-05-05T20:28:04-03:00
2014-05-05T20:33:51-03:00
Feito uma árvore das possibilidades temos:


Lanche 1 - S1 + R1/ S2 + R2/ S3 + R3/ S1 + R2/ S1 + R3/ S2 + R1/ S2 + R3/ S3 + R1/ S3 + R2

Lanche 2- S1 + R1/ S2 + R2/ S3 + R3/ S1 + R2/ S1 + R3/ S2 + R1/ S2 + R3/ S3 + R1/ S3 + R2

Lanche 3- S1 + R1/ S2 + R2/ S3 + R3/ S1 + R2/ S1 + R3/ S2 + R1/ S2 + R3/ S3 + R1/ S3 + R2

Lanche 4- S1 + R1/ S2 + R2/ S3 + R3/ S1 + R2/ S1 + R3/ S2 + R1/ S2 + R3/ S3 + R1/ S3 + R2

Lanche 5- S1 + R1/ S2 + R2/ S3 + R3/ S1 + R2/ S1 + R3/ S2 + R1/ S2 + R3/ S3 + R1/ S3 + R2

(R = refrigerante) (S = Sorvete)

Basicamente é só fazer 5x3x3 = 45 (Pode contar as possibilidades a cima pra conferir) ;)