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March 28, 2017

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Here is the question:
Patty has a bag of 72 marbles. The ratio of green marbles to yellow marbles is 2 to 7. How many green marbles does patty have?
I don't know how to answer it. Please help!

  • Math - ,

    Yellow : green = 7 : 2

    2 in 9 marbles are green,
    x in 72 are green,
    so cross-multiply to get
    x=2*72/9=16 green marbles out of 72.

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