# Primary 6 math question

I am not sure which concept to apply here. Appreciate your pointers. Thanks.

Question:
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?

### Comments for Primary 6 math question

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 Sep 06, 2016 Rating Specific grade 6 resources for kids by: A4K Not sure either where the concept applies. But there is a great website I found that provides an interactive penalty shootout math games for kids in grade 6 and 7 and you should try it out. http://algebra4kids.com/algebra-games-collection.html

 Aug 02, 2016 Rating Answers Posted Above by: Zach Hi Cecilia, Thank you for sending in the question. I have posted the solution above, Let me know if anything is not so clear. Send me more questions if need help with other questions.

 Aug 01, 2016 Rating Primary 6 Math question- Can't get my head around this... by: Anonymous Hi Zach,Re-posting the below question: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?Could you please post the correct video to the above question? Can't work out the answer.. would love to see how you solve this problem.ThanksCecilia