Today's SAT math question

  • #1
36
0
To make an orange dye, 3 parts of red dye are mixed with 2 parts of yellow dye. To make a green dye, 2 parts of blue dye are mixed with 1 part of yellow dye. If equal amounts of green and orange are mixed, what is the proportion of yellow dye in the new mixture?

This is not a homework question btw. My answer is 3/8. Yet the correct answer is 11/30. Can anyone explain why?

I don't agree with the explanation here:
http://apps.collegeboard.com/qotd/explain.do?questionId=432&src=E
 

Answers and Replies

  • #2
1,707
5
To make an orange dye, 3 parts of red dye are mixed with 2 parts of yellow dye. To make a green dye, 2 parts of blue dye are mixed with 1 part of yellow dye. If equal amounts of green and orange are mixed, what is the proportion of yellow dye in the new mixture?

This is not a homework question btw. My answer is 3/8. Yet the correct answer is 11/30. Can anyone explain why?

I don't agree with the explanation here:
http://apps.collegeboard.com/qotd/explain.do?questionId=432&src=E
lol why would you not agree with it? it's correct and good reasoning.
 
  • #3
36
0
haha. i get it now. thx.
 

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