Răspuns :
D12=(1,2,3,4,6,,12) => x si y apartin fiecarui nr. fara 12
nr cazurilor posibile : 12,13,14,16,21,23,24,26,31,32,34,36,41,42,43,46,61,62,63,64 (20 de cazuri)
P=20\90
nr cazurilor posibile : 12,13,14,16,21,23,24,26,31,32,34,36,41,42,43,46,61,62,63,64 (20 de cazuri)
P=20\90
sunt 90 numere
x =1,2,..9
y=0,1,2...9
x · y =12 = 2·6 = 3·4 = 4·3 = 6·2
numerele cu aceasta conditie :26, 34,43 ,62
p = 4/90 = 0,04 = 4 %
x =1,2,..9
y=0,1,2...9
x · y =12 = 2·6 = 3·4 = 4·3 = 6·2
numerele cu aceasta conditie :26, 34,43 ,62
p = 4/90 = 0,04 = 4 %