Question:


    III.B.42.     Assume that a background count is subtracted from the measured count of a radio-active sample.     The expected error in the difference will be:

    a.     Equal to the error for the measured counts.

    b.     Equal to the error for the background counts.

    c.     Less than the error for either measured or background.

    d.     More than the error for each the measured and background.





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