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1.The ans to the first sum cannot be determined by the data... the set of nos can be arbitrarily wide or close...
4. The radii of the concentric circles not being given... one cannot determine the probability of selecting a point in the region betn the circles which can be made arbitrarily large or small as we increase the radii of the large circle..
10. Interpreting this sum as (10^50)*(m+h)... the remainder when m+h is divided by 9 must be zero if the data is to be consistent... B
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