Question 1198376
Number of People-----Type of Insurance

{{{19}}}---------------------- Managed care plan
{{{15}}}---------------------- Traditional insurance
{{{5}}}----------------------- No insurance

 the sample contains {{{39}}} people.

{{{P}}}(at least {{{1}}} had traditional insurance) = {{{1 - P}}}(none had traditional insurance)

{{{P}}}(none had traditional insurance) = {{{((19+5)/39) * ((19+5-1)/38) =92/247=0.3724696356275304}}}
{{{P}}}(at least {{{1}}} had traditional insurance) ={{{ 1 - 0.3724696356275304=0.6275}}}


The probability that at least one has traditional insurance is {{{0.6275}}}