circuito paralelo

r1 x r2/r1 + r2 =1000 x 300/1000+330 = 250 ohms

rT = r 1 2 x r3/r 1 2+ r3 = rT=250 x 120/ 250 + 120 = 80 oms

IT =vt/rt =9v/80 ohms = 111 mA

Ir1= vr1/r1 = 9/1=9 mA

ir2=vr2/r2=9/330= 0.027= 27 mA

IR3=vr3 =9/120= 0,075= 75 mA