250 hundred multiples of seven are chosen at random, and 250 multiples of eight are chosen at random. Approximately what percentage of the 500 selected numbers are odd?
Choose the correct choice from the following options:
A) 25.5%
B) 26%
C) 30%
D) 25%
E) 40%
--&gt; Multiples of 7 are 7, 14, 21, 28, 35, 42....   Out of first 4 multiples, 2 are odd; out of first 6 multiples, 3 are odd.   So approx. 50 % of the 250 multiples are odd i.e 125 multiples.   --&gt; Similalrly, for 8 multiples are:8,16,24...   All are even so 0 % are odd.   Total odd= (125+0)/(250+250)= 125/500=1/4 = 25%   Answer 25%
<result>D</result>
250 hundred multiples of seven are chosen at random, and 250 multiples of eight are chosen at random. Approximately what percentage of the 500 selected numbers are odd?