120 who got diarrhea ate lettuce. 80 with diarrhea did not eat lettuce. 40 without diarrhea ate lettuce. 160 without diarrhea ate lettuce. What is the odds ratio of eating lettuce and developing diarrhea?

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1. 120 who got diarrhea ate lettuce. 80 with diarrhea did not eat lettuce. 40 without diarrhea ate lettuce. 160 without diarrhea ate lettuce. What is the odds ratio of eating lettuce and developing diarrhea?