Science
posted by Jenny .
There Are Three Resistance In A Parallel Circuit. Two Of Them Are Rated At 20 Ohms, The Other At 10 Ohms. What Is The Circuit's Total Resistance?
I believe the answer D 5ohms
A. 20 ohms
b. 12 ohms
c. 8 ohms
d. 5 ohms

1/R = 1/20 + 1/20 + 1/10 = 4/20 = 1/5
R = 5