Given that w + x = - 4, x + y = 25 and y + w = 15, what is the average (arithmetic mean) of w, x and y?

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প্রশ্নঃ Given that w + x = - 4, x + y = 25 and y + w = 15, what is the average (arithmetic mean) of w, x and y?

  • ক. 36
  • খ. 18
  • গ. 9
  • ঘ. 6

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