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  1. Jul 7, 2009 #1


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    1. The problem statement, all variables and given/known data
    In a Mixture of peanuts and cashews, the ratio by weight of peanuts to cashews is 5 to 2. how many pounds of cashews will there be in 4 pounds of this mixture?

    2. Relevant equations

    3. The attempt at a solution

    I used 5/2 as seven pounds in the original ratio.

    Then I tested out some numbers for 2, such as 1.2, 1.4 and they all added up to a number close to four. I didn't reaaly know how to set the problem up so I ended up getting it wrong. I got 1.2.
  2. jcsd
  3. Jul 7, 2009 #2

    Doc Al

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    Staff: Mentor

    Nothing wrong with thinking that 5 lbs of peanuts plus 2 lbs of cashews = 7 lbs.

    To reduce 7 lbs to 4 lbs, what would you multiply by? Multiply all quantities by the same number to retain the 5/2 ratio.
  4. Jul 7, 2009 #3


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    I just got it out of insight from your reply. Thank you.
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