Question 352534: 45% of those who purchase music CDs online are 18-23 years old. This is three
and one-half times the number who are 38-43 years old. What percent of online
music purchasers are 38-43 years old?
Answer by Jk22(389)   (Show Source):
You can put this solution on YOUR website! 45% of those who purchase music CDs online are 18-23 years old. This is three
and one-half times the number who are 38-43 years old. What percent of online
music purchasers are 38-43 years old?
This is 45 divided by 3.5, equals 12.8% approximatively of total number of purchaser :
let x be the number of purchaser, .45x is the one being 12-23 y. old,
then .45x=3.5y, y being the number of 38-43 y. old.
hence y=.45/3.5x=12.8% of x
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