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 redt t-shirts, what percent of the people at the party were men?
(A) 80 %
(B) 60 %
(C) 50 %
(D) 40 %
(E) 33 1/3 %
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Set up a matrix. Or just read it: (men with redt) + (men without redt) = 80 pc
ReplyDeleteIt's 50%
ReplyDeletex=total strength, m=number of males
ReplyDelete0.2x=0.4m
m/x=0.5
or 50%