A neurologist has been studying the relationship of stroke to elevated blood pressure in elderly patients and?

A neurologist has been studying the relationship of stroke to elevated blood pressure in elderly patients and has obtained the following statistical information from previous investigations and through a review of the literature on cerebral vascular accidents. For person over age 70, 10 percent will have a stroke within the next 5 years; of all patients aged 70+ who had a stroke, 50 percent demonstrate elevated blood pressure; and for persons aged 70+ without strokes, 25 percent have elevated blood pressure. A patient aged 70+ in the neurologists practice has elevated blood pressure. What is the probability this patient will have a stroke within the next 5 years?