The death rate per 100,000 for lung cancer is 7 among nonsmokers…

The death rate per 100,000 for lung cancer is 7 among nonsmokers and 71 among smokers. The death rate per 100,000 for coronary thrombosis is 422 among nonsmokers and 599 among smokers. The prevalence of smoking in the population is 55%.
what is the RR of dying of lung cancer for smokers versus nonsmokers?

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