Question 510774
the key here may be "expect"


you know that 1/4 are male and 1/5 are from out of town


you would expect that the male patrons would have the same portion of out-of-towners as the female patrons


similarly, you would expect that the out-of-towners would have the same portion of males as the local patrons


either way you look at it, 1/5 of the males or 1/4 of the out-of-towners will give you the same "expected" result