Practice Test Discussion

Q)

There are two numbers such that the sum of twice the first number and thrice the second number is 100 and the sum of thrice the first number and twice the second number is 120. Which is the larger number?

[Corporation Bank (PO), 2010]

    • Explanation

    Let the numbers be x and y, wherex>y.∴ 2x + 3y = 100       ----(i)    3x + 2y = 120       ----(ii)From Eq. (ii) x 3- Eq. (i) x 2, we have⇒9x + 6y−4x−6y = 360−200⇒5x = 160∴ x=1605 = 32

    Hence, Option A is correct.

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