What are the meter readings in the circuit?

[looi76]

Homework Statement

http://img372.imageshack.us/img372/8240/1005200803ki4.png
What are the meter readings in the circuit on the top?

Homework Equations

$$V = IR$$

The Attempt at a Solution

$$I = \frac{V}{R}$$

$$A_2 = \frac{12}{\frac{20}{75}} = 45A$$

$$A_3 = \frac{12}{\frac{30}{75}} = 30A$$

$$A_1 = \frac{12}{75} = 0.16A$$

Are my answers correct?

 

[Defennder]

I don't think your answers are correct. What is 75? Is it supposed to be total equivalence resistance of the circuit? If so, then that means the equivalent resistance of the resistors in parallel is 25 ohms, which is not right. What is the formula to find equivalent resistance of resistors in parallel?