Question: Source A + background: Source B+ background: Background: What is the ratio of the activity of source B to source A, and what is

Source A + background: Source B+ background: Background: What is the ratio

Source A + background: Source B+ background: Background: What is the ratio of the activity of source B to source A, and what is the percent standard deviation in this ratio? The following data are obtained from sources A and B for the same isotope: 272 counts, 6 min (measurement time) 824 counts, 3 min (measurement time) 51 counts, 10 min (measurement time)

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