A survey is taken among customers of a fast-food restaurant to
determine their preference for hamburger or chicken. Of 400
respondents selected, 290 were children and the rest were
adults. 260 preferred hamburger and the rest preferred
chicken. 175 of the children preferred hamburger.
The probability that a randomly selected individual is an adult
is ________.
(Round your answer to three decimal places. Express your answers
as a probability, not a percentage.)