MathematicsIf the median of the data: 24, 25, 26, x + 2, x + 3, 30, 31, 34 is 27.5, then x =

If the median of the data: 24, 25, 26, x + 2, x + 3, 30, 31, 34 is 27.5, then x =


  1. A
    27
  2. B
    25
  3. C
    28
  4. D
    30 

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    Solution:

    The given observations are 24, 25, 26, x + 2, x + 3, 30, 31, 34.
    Median = 27.5
    Here, n = 8
    Median = n2th term+n2+1th term2
    Median = 82th term+82+1th term2
    Median = 4th term+5th term2
    Here the 4th term is x + 2 and 5th term is x + 3.
    That is Median= x+2+x+3 2  
    27.5 = 2x+5 2 27.5×2 =2x+5 55 =2x+5 2x =555 =50 x = 50 2 =25  
    Therefore, the value of x is 25.
    Hence, the correct option is 2.
     
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