Primary 6 Question-how to solve this

by Cecilia
(Australia)

Hi Zach,


Re-posting the below question as I could not find the answer on your website

I have some red and yellow marbles in a bottle.
If i add in 20 red marbles, 60% of my marbles are yellow.
If I add in another 60 yellow marbles, 75% of my marbles are yellow.
How many marbles do i have in the bottle?

Can't wait to see your answer.

Many Thanks
Cecilia

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Aug 02, 2016
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by: Zach

Hi Cecilia,

You are most welcomed. Let me know if anything is unclear in the solution. Feel free to send more questions if you need more help.
Aug 02, 2016
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starstarstarstarstar 		Thanks Zach!
by: Cecilia

Hi Zach,

Thanks for coming back with the answer (with video) to my question so quickly!! :-) I am really impressed!

Thanks again.
Cecilia
Aug 02, 2016
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by: Zach

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