Q:

A cross-sectional study was conducted at Wah Medical College in the year 2006 to measure the period prevalence of smokers among 105 students. Out of them 5 were already smokers and 15 started during 2006, period prevalence of 2006 is:

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A cross-sectional study was conducted at Wah Medical College in the year 2006 to measure the period prevalence of smokers among 105 students. Out of them 5 were already smokers and 15 started during 2006, period prevalence of 2006 is:


  1. 22%
  2. 19%
  3. 15%
  4. 11%
  5. 10%

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b) 19% 

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