Question

Câte numere cu 3 cifre distincte pot forma cu: a) { 1,3,5,7,9} b) { 0,2,4,6,8}

Answer 1

Răspuns:

a) 135, 137, 139, 153, 157, 159, 173, 175, 179, 193, 195, 197, 315, 317, 319, 351, 357, 359, 371, 375, 379, 391, 395, 397.....

Deci : 12 x 5 = 60

Răspuns A : 60 numere

b) 204, 206, 208, 240, 246, 248, 260, 264, 268, 280, 284, 286, 402, 406, 408, 420, 426, 428, 460, 462, 468, 480, 482, 486......

Deci : 12 × 5 = 60

Răspuns B : 60 numere