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Discussion

  1. The average of x1, x2 and x3 is 14. Twice the sum of x2 and x3 is 30. What is the value of x1 ?
    1. 20
    2. 27
    3. 16
    4. 2
  1. Correct Option: B

    x1 + x2 + x3 = 3 x 14 = 42 ....(i)
    and (x1 + x2) x 2 = 30
    ⇒ x1 + x2 =15 ....(ii)
    From Eqs. (i) and (ii), we get
    x1 + 15 = 42
    ∴ x1 = 42 - 15 = 27


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