CAT 2020 Slot 3 QA Q15 Equations

Question 15 of the Quantitative Ability (QA) section, CAT 2020 Slot 3, with CAT's official answer.

Let k be a constant. The equations kx + y = 3 and 4x + ky = 4 have a unique solution if and only if
  1. A
    |k| = 2
  2. B
    k ≠ 2
  3. C
    |k| ≠ 2
  4. D
    k = 2

Answer: (C) |k| ≠ 2 Equations MCQ

A worked solution for this question is being written. Meanwhile, practise it in a timed mock and see how other aspirants did.

Same concept in other years

See every question on Unique, none or infinitely many solutions of a 2×2 linear system.

More Equations questions from CAT

All 52 Equations questions asked since 2017.