math

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the mean of a list of seven numbers is 45. if i add two numbers to this list the mean of he list becomes 37 what is the mean of the two numbers that i added to the list

  • math -

    Sum of the seven number = 7(45) = 315

    after adding 2 more the sum is now 9(37) or 333

    so the sum of the two numbers added must have been 18
    or their average (mean) must have been 18/2, which is 9

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