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Determine the ratio of the number of ...

Determine the ratio of the number of people having characteristic X to the number of people having characteristic Y in a population of 100 subjects form the following table: Having X and Y 10 Having X but not Y 30 Having Y but not Y 20 Having neither X nor Y 40 `1:2` b. `2:3` c. `3:2` d. `4:3`

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