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  • Default User Avatar

    You do NOT need to add your own score x. Proof :
    The mean of the classroom (without your own score x) is : m1=(x1+x2+...+xn)/n.
    The mean of the classroom (includind your own score x) is : m2=(x1+x2+...+xn+x)/(n+1)=(nm1+x)/(n+1).
    If you know that m1<x then you know that m2<(nx+x)/(n+1) i.e m2<(n+1)x/(n+1) and finally m2<x. Same proof for >.

  • Custom User Avatar

    It does not matter. You could add your own points 1000 times and still pass the test (as long as you don't run into any rounding errors).