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A, B and C together earn Rs.150 per day while A and C together earn Rs.94 and B and C together earn Rs.76. The daily earning of C is:__________?

Correct answer: C. 20 Rs.

  • A. 10 Rs,
  • B. 15 Rs,
  • C. 20 Rs.
  • D. 25 Rs.

Explanation

Let the daily earnings be A, B and C rupees. Subtracting A + C = Rs.94 from A + B + C = Rs.150 gives B = Rs.56; then B + C = Rs.76 gives C = Rs.76 - Rs.56 = Rs.20 per day. The likely mistake is option b, Rs.15, from incomplete elimination or subtracting the wrong pair of equations.

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