Question 373680
Probability is outcomes for snow over total outcomes. 
Odds against snowing would be outcomes against snow to outcomes for snow.
Outcomes for snow={{{6}}}
Outsomes against snow={{{4}}}
Total outcomes={{{10}}}
{{{P(snow)=6/10}}}
Odds for snow= {{{6}}}:{{{4}}} or {{{3}}}:{{{2}}}
Odds against snow= {{{2}}}:{{{3}}}