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Sticky Note
If the average arithmetic mean of 8,12,15,21. x an 11 is 17 than what is x ?
  1. 35
  2. 3
  3. 15
  4. 17
Explanation

As given:    (8 + 12 + 15 + 21 + x + 11)/ 6 = 17

67+x = 17 x 6

67+x = 102

        x = 102-67

         x = 35

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