GMAT Problem Solving

Home > GMAT Test > GMAT Problem Solving Questions

Next steps

Source: OG11th

Level: 4

In an electric circuit, two resistors with resistances x and y are connected in parallel. In this case, if r is the combined resistance of these two resistors, then the reciprocal of r is equal to the sum of the reciprocals of x and y. What is r in terms of x and y ?

  • A xy
  • B x+y
  • C
  • D
  • E

Show Answer

Previous       Next