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In-a-locality-20-of-population-have-a-chronic-disease-Among-these-people-who-has-a-chronic-disease-2-5-have-COVID-19-Among-the-people-who-don-t-have-a-chronic-disease-99-have-not-COVID-19-C




Question Number 134752 by mathocean1 last updated on 06/Mar/21
In a locality, 20% of population have  a chronic disease. Among these   people who has a chronic disease, 2.5 %  have COVID−19. Among the people  who don′t have a chronic disease, 99%  have not COVID−19.  Calculate the probability that one person  of this locality has COVID−19 and a  chronic disease.^
$${In}\:{a}\:{locality},\:\mathrm{20\%}\:{of}\:{population}\:{have} \\ $$$${a}\:{chronic}\:{disease}.\:{Among}\:{these}\: \\ $$$${people}\:{who}\:{has}\:{a}\:{chronic}\:{disease},\:\mathrm{2}.\mathrm{5}\:\% \\ $$$${have}\:{COVID}−\mathrm{19}.\:{Among}\:{the}\:{people} \\ $$$${who}\:{don}'{t}\:{have}\:{a}\:{chronic}\:{disease},\:\mathrm{99\%} \\ $$$${have}\:{not}\:{COVID}−\mathrm{19}. \\ $$$$\boldsymbol{{C}}{alculate}\:{the}\:{probability}\:{that}\:{one}\:{person} \\ $$$${of}\:{this}\:{locality}\:{has}\:{COVID}−\mathrm{19}\:{and}\:{a} \\ $$$${chronic}\:{disease}.^{} \\ $$

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