Of the three numbers whose average is 60, the first is one fourth of the sum of the other. The first number is …

  1. 30
  2.  36
  3.  42
  4.  45
Anurag Mishra Professor Asked on 23rd January 2016 in No Category.
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  • 1 Answer(s)

    Answer: (2) 36 

    Explanation:-
    The average of three numbers = 60 
    Therefore, sum of three numbers = 3 x 60 
     = 180 

    Let the sum of second and third be X

    According to question, 
    First number = X/4

    Then, X + X/4 = 180
    4 X + X = 180 x 4
     5 X = 720
    X = 720/5
    X = 144

    So, the first number = X/4 = 144/4
     = 36

    Hence, the correct answer is option (2) 36. 

    Anurag Mishra Professor Answered on 23rd January 2016.
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