SOLUTION: At Glenridge High School, 20 percent of the students are seniors. If all of the seniors attended the school play, and 60 percent of all the students attended the play, what percent

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Question 618698: At Glenridge High School, 20 percent of the students are seniors. If all of the seniors attended the school play, and 60 percent of all the students attended the play, what percent of the non-seniors attended the play?
A)20%
B)40%
c)50%
D)60%
E)100%
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

20 percent of the students are seniors...all of the seniors attended the school play

60 percent of all the students attended the play

 what percenthighlight%28x%29 of the non-seniors (80% of the student body) attended the play?

   .60 = .20 + x(.80)

    .40/.80 = x = .50 

     50% of the non-seniors attended the play