Rezolvati tabelul de mai jos

Răspuns:
a)35%
b)25%×800=25×800/100=25×8=200
c)numar cazuri favorabile/ numar cazuri posibile
bile negre: 40×800/100= 40×8= 320
320/800= 40/100=10/25=2/5
raspuns 2/5
d)numar cazuri fav/numar caz pos.
520/800= 130/200= 13/20