Question 639076
<pre>
PROBABILITY = {{{S/(S+F)}}} = {{{1/4}}}

ODDS in favor = S:F

ODDS against = F:S

{{{1/4}}} = {{{S/(S+F)}}}

Cross multiply

4S = S+F
3S = F

Divide both sides by S

{{{3/1 = F/S}}}

Therefore F:S = 3:1

Edwin</pre>