SOLUTION: Question 9. On their way to work, Andrew passes 15 sets of traffic lights and Pauline passes 10 sets of traffic lights. One morning Andrew was stopped by 12 red traffic lights. Ho

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: Question 9. On their way to work, Andrew passes 15 sets of traffic lights and Pauline passes 10 sets of traffic lights. One morning Andrew was stopped by 12 red traffic lights. Ho      Log On


   



Question 1181570: Question 9.
On their way to work, Andrew passes 15 sets of traffic lights and Pauline passes 10 sets of traffic lights. One morning Andrew was stopped by 12 red traffic lights. How many green traffic lights would Pauline need to pass through to have the equivalent ratio of red to green traffic lights as Andrew?

Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
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Write a proportion


    12%2F15 = x%2F10.


From the proportion, find  x = %2812%2A10%29%2F15 = 8.      ANSWER

Solved.