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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