If 20% of the people at a college party were men who were wearing red t-shirts, and 60% of the men at the party were not wearing red t-shirts, what percent of the people at the party were men?

(A) 80 %
(B) 60 %
(C) 50 %
(D) 40 %
(E) 33 1/3 %

I got answer C. Can anyone verify?

Let # of people at party = x
Let # of men at the party = m
.2x = .4m
m/x= 1/2
Question asked : %/100 * x = m
% = 100*m/x = 100*1/2 = 50 ( answer c)