Answer:
1 1/3 or 1.33333
Explanation:
First of all, you should note that the answer will be smaller than the smallest resistor. That means that the answer should be less than 3. Let's see if it is.
1/R1 + 1/R2 + 1/R3 = 1/Rt
All resistors are in ohms.
1/4 + 1/3 + 1/6 = 1/Rt You could do this using decimals, but the usual way is to use fractions.
The Common Denominator is 12
3/12 + 4/12 + 2/12 = 1/Rt
9/12 = 1/Rt Turn 9/12 upside down
12/9 = Rt
1 3/9 = RT
1 1/3 = Rt
1.3333 = Rt
The answer is under 3 so we know it should be right.
