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Q:

A student was asked to find the arithmetic mean of the following 12 numbers: 3, 11, 7, 9, 15, 13, 8, 19, 17, 21, 14 and x He found the mean to be 12. The value of x will be:

  • 1
    17
  • 2
    31
  • 3
    3
  • 4
    7
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Answer : 4. "7 "

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