What will be the Third Number? If

The average of three numbers is 28. The first number is half of the second and the third number is twice the second. The third number is

  1. 18
  2. 26
  3. 36
  4. 48
vijay Professor Asked on 5th August 2015 in Maths.
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  • 1 Answer(s)

    Answer: (4) 48
    Explanation:-
    The average of three numbers = 28
    Then, the sum of three numbers = 28 x 3
    = 84

    Let the second number be X,
    Then, the second number = X /2
    And the third number = 2 X

    Then, X / 2 + X + 2 X = 84
    (X + 2 X + 4 X ) /2 = 84
    7 X = 84 x 2
    X = 84 x 2 / 7
    X = 12 x 2
    X = 24

    Then, the third number is 2 X = 24 x 2
    = 48

    Hence,the answer is (4) 48.

    Anurag Mishra Professor Answered on 6th August 2015.
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