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  • Question
  • Average of a,b and c is 11, average of c,d and e is 17 average of e and f is 22 and the average of e and c is 17 . Find out the average of a, b, c, d, e and f.


  • Options
  • A. 151?3
  • B. 162?3
  • C. 171?2
  • D. 152?3

  • Correct Answer
  • 152?3 

    Explanation

    a + b + c = 11 x 3 = 33 .....(i)
    c + d + e = 17 x 3 = 51 .....(ii)
    e + f = 22 x 2 = 44 .....(iii)
    e + c = 17 x 2 = 34 .....(iv)

    From Eqs. (ii) and (iv), we get
    34 + d = 51
    ? d = 17

    Now adding Eqs. (i), (ii), (v), we get
    a + b + c + d + e + f = 33 + 44 + 17 = 94
    ? Average of a, b, c, d, e and f = 94/6 = 152?3


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    • 2. 
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    • 3. 25, 36, 49, 81, 121, 169, 225

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