1.In one study, researchers at a clinic looked at more than 120,000 patients enrolled in 14 international studies in the past 10 years. Among the patients with heart problems, researchers found at least one risk factor in84.7% of the women and80.7% of the men.

2.If a woman is selected at random from the women with heart problems, what is the probability she has none of the risk factors? Answer as a percentage.