1. The Gallup Organization conducted a national poll in 2003. Adults in the poll were asked what type of health insurance coverage they have, given they had used an emergency room at least once in the last 12 months. Of those who used an emergency room in the last 12 months:

Type of Insurance Coverage	Proportion
Private insurance	0.22
Medicare/Medicaid	0.36
No health insurance	0.27
Other	0.15

1. Estimate the probability that an emergency room patient has health insurance. 0.22+0.36=0.58
2. Given that a subject has health insurance, estimate the probability it is private.