MathematicsIf 5,k,11 are in AP, then the value of k is

If 5,k,11 are in AP, then the value of k is


  1. A
    6
  2. B
    7
  3. C
    8
  4. D
    9 

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    Solution:

    Given that the A.P is 5, k, 11. Here, 5 is a first term, k is a second term, and 11 is a third term.
    Therefore, second term – first term = Third term – first term.
    k5=11k k+k=11+5 2k=16 k=8  
    Hence, the correct option is 3.
     
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