Gce Model Questions Vol1 2019 Agricultural Science Question 47
Practice objective / multiple choice question 47 from the 2019 Gce Model Questions Vol1 Agricultural Science examination.
On a cattle farm, 120 animals were vaccinated against disease X and 3 of them became ill during a one‑month observation period. In an unvaccinated group of 80 animals, 12 fell ill with the same disease. Calculate the vaccine efficacy percentage and state whether the vaccine provides substantial protection (efficacy > 70 %).
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About This Question
This is Gce Model Questions Vol1 2019 Agricultural Science Question 47. It is one of the objective questions from the 2019 Gce Model Questions Vol1 Agricultural Science examination.
Difficulty level: Medium .
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