Question

Va roooooooooooooooog!
Dau coroana

Answer 1

1.)
a)
p=pretul pixului
3p=9/:3
p=3
12*3=36 lei

b)
m=pretul unui kg de mere
5m=20/:5
m=4 lei
60:4=15 kg

c)
2 robinete ................................ 12 ore
1 robinet .................................. x ore      =>x=12/2=6 ore

2.)
a)20<40 =>F
b)(20+30+50+40+60+40)/6=240/6=40 =>A
c)nr cazuri favorabile:4
nr cazuri totale;6               
probabilitate:4/6=2/3=0,(6) =>A

3.)
a){a;3}d.p.{5;b}=>a/5=3/b=>ab=3*5 =>ab=15 => varianta B
b){c;6}d.p.{12;4}=>c/12=6/4 =>c=(12*6)/4=18 => varianta D 
c){x;5}i.p.{60;y}=>60x=5y =>x/y=60/5=12 => varianta A
d){z;2} i.p.{4;28}=>4z=2*28 => 4z=56/:4 =>z=14 => varianta C