calaculate the resistance if two 3 ohm resitsors are placed in series and another 3 ohm was attached in parallel

total resistance for resistors in series is the addition of the resistances therefore the two 3 ohm resisters in series totals 6 ohms resistors in parallel follow the equation : 1/R_T = 1/R₁ + 1/R₂therefore total resistance = (1/6 + 1/3)^-1R_T = 2 ohms