There are three resistors of 3Ω, xΩ and 7Ω where x is larger than 3 but lesser than 7. What is the possible effective resistances when connected together, in series or in parallel?
a. 9Ω when connected in series
b. 10Ω when connected in series
c. 4Ω when connected in parallel
d. 2Ω when connected in parallel
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Answer:
c.
Explanation: