math

Recently a census was taken on space station Gamma. Of the 100 residents interviewed, 75 traced their ancestry to the planet Omicron, 85 traced their ancestry to the planet Omega and 60 residents traced their ancestry to both planets. How many residents had ancestors from ONLY Omicron and how many residents had ancestors from ONLY Omega?

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asked by Olivia
  1. number(Omicron only) = 75-60 = 15
    number(Omega only) = 85-60 = 25

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    posted by Reiny

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