Răspunsuri

2014-07-23T11:04:24+03:00
P-Probabilitatea
P=nr.cazuri favorabile/ nr.cazuri posibile
Numerele care contin cifra 1 sunt 10,11,12,13,14,15,16,17,18,19,21,31,41,51,61,71,81,91
Deci nr. cazuri favorabile :18
Nr.cazuri posibile:90
P=18/90=2/10=1/5
1 5 1