Question
In each population, 30% of the population is affected
with asthma out of which 90% of asthma patients used to work in flour mills. If 30% of the total population was working in flour mills, then what will be the percentage of the people working in flour mills who are suffering from asthma?Solution
Let the total population =100. Affected with asthma=100×20/100=30 Asthma patients used to work in flour mills=100×90/100=90. Working in flour mills =100×30/100=30. People who suffer from asthma but do not work in flour mills=90- [30+30] =30%people People working in flour mills who are suffering from asthma=100-30=70%.
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