Four hundred multiples of seven are chosen at random, and 100 multiples of eight are chosen at random. Approximately what percentage of the 500 selected numbers are odd?  Choose the correct choice from the following:
A) 20% B) 25% C) 40% D) 50% E) 80%
About half the multiples of seven will be odd while all the multiples of eight are even.   The percentage of odd numbers is about (1/2)(400) / 500 = 40%   The answer is 40%.
<result>C</result>
Four hundred multiples of seven are chosen at random, and 100 multiples of eight are chosen at random. Approximately what percentage of the 500 selected numbers are odd?