From Kirchhoff's junction law, the sum of current into a junction is equal to the sum of current out of the junction.

Current, i = V/R

Current through the first resistor:

i_{1} = 8/10 = 0.8 A

Current through the second resistor:

i_{2} = 8/15 = 0.533 A

What is the value of resistor R in the figure below?

a. 4.0 Ω

b. 12 Ω

c. 36 Ω

d. 72 Ω

e. 96 Ω

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