Question

Heart disease was the leading cause of death for women in the united​ states, killing​ 292,188 women in​ 2009-that was approximately one in every four female deaths. what is the chance of two​ non-related women in a row both having heart​ disease

Answer 1

Heart disease was approximately one in every four female deaths, so you can say the chance of getting heart disease is 1/4. The event in this problem should be independent. So, the calculation of the chance would be:
chance= woman1 risk * woman2 risk
chance= 1/4 * 1/4= 1/16= 6.25%