s= suma initiala de bani
cat a cheltuit prima data=s/3, rest=s-s/3=2s/3
cat a cheltuit a doua oara=(2s/3)*1/5=2s/15, rest=(2s/3)-2s/15=(10s-2s)/15=8s/15
cat a cheltuit a treia oara=(8s/15)*1/8=8s/120=s/15
s/3+2s/15+s/15=7200, numitor comun 15
5s+2s+s=, 15s=108000, s=108000/8=13500 lei, raspuns corect A
