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What is the magnitude of the current flowing throw a device?

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The resistance of the first device is 12 ohms, the resistance of the second device is 4 ohms, and the voltage developed by the generator is 40 V. What is the magnitude of the current flowing through the first device?
(a) 3.33 A
(b) 8A
(c)10A or
(d) 13.32A

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This solution shows the steps for calculate current for resistances connects in parallel.

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Wherever two resistances are connected in parallel, they are connected to the same potential ...

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