If the average (arithmetic mean) of x and y is 60 and the average (arithmetic mean) of y and z is 80, what is the value of (z-x)?

গণিত বীজগণিত 05 Oct, 2018

প্রশ্ন If the average (arithmetic mean) of x and y is 60 and the average (arithmetic mean) of y and z is 80, what is the value of (z-x)?

  • ক.
    70
  • খ.
    40
  • গ.
    20
  • ঘ.
    None

সঠিক উত্তর

40

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