Question 1090840
There are 3000 students at Canyon High School and 2/5 of these students are seniors.
 If 4/5 of the seniors are opposed to the school forming a rock climbing team and 9/10 of the remaining students (not seniors) are also opposed to forming a rock climbing team,
 how many students are in favor of this idea? 
:
{{{2/5}}}*3000 = 1200 seniors
then
3000 - 1200 = 1800 students not seniors
therefore
{{{4/5}}} * 1200 = 960 do not like rock climbing
and
{{{9/10}}} * 1800 = 1620 also do not like it
:
"how many students are in favor of this idea?"
subtract the "don't likes" from 3000
3000 - (960+1620) = 420 like rock climbing 
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