Question 346172
There are {{{83}}} numbers exactly divisible by 6 from 6 to 498.
There are  {{{55}}} numbers exactly divisible by 9 from 9 to 495.
There are {{{27}}} numbers that are exactly divisible by 6 and 9 from 18 to 486, we don't want to double count those.
There are 500 numbers total.
{{{P=83/500+55/500-27/500}}}
{{{P=111/500}}}