FAVEROL wrote:
sorry but i didn't get the explanation!
Here we have to take care of 2 distinctions.
1) participants
2) Democrats
To find :- #female Democrats=F/2,say F is #of female participants (Given half of the female participants are democrats )
Given :-
#participants=750=#male participants+#female participants or #male participants=750-#female participants–-----------(a)
#democrats=One-third of participants=750/3=250
Half of #female participants+one-fourth of male participants=#democrats=250----(b)
Since we need #female participants,so we have to substitute #male participants by a expression that relates to #female participants.(Expression (a) )
So expression(b) can be written as
#female participants/2+1/4*(750-#female participants)=250
Now the above expression is an algebra equation with 1 variable,so we can solve it.
F/2+750/4-F/4=250
F/2-F/4=250-750/4=250/4
Or. F/4=250/4
Multiply both sides by 2
F/2=125
Ans. (C)
Hope this helps.
_________________
Regards,
PKN
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