In a study of helicopter usage and patient survival, among the

46,188

patients transported by helicopter,

221

of them left the treatment center against medical advice, and the other

45,967

did not leave against medical advice. If

40

of the subjects transported by helicopter are randomly selected without replacement, what is the probability that none of them left the treatment center against medical advice?

Question content area bottom

Part 1

The probability is

enter your response here.

(Round to three decimal places as needed.)