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Shannonlane

Arthur is organising hig collection of DVDs. He has 36 altogether... The ratio of comedy films to action to horror is 4:7:1. How many of each type of DVD does he have?

  • one year ago
  • one year ago

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  1. msayer3
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    so based on the ratio, for every 12 DVDs, he has 4 comedy, 7 actions and 1 horror

    • one year ago
  2. msayer3
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    now, all you need is to figure out how that ratio would change for 36 DVDs instead of 12 DVDs

    • one year ago
  3. Shannonlane
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    what?:L, sorry but i'm not the clever type so dont see how i'm going to work it out

    • one year ago
  4. msayer3
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    alright, what do you get if you divide 36 by 12?

    • one year ago
  5. Shannonlane
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    erm 3?:/

    • one year ago
  6. msayer3
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    yes - so now, the ratio was orignally set for 12 DVDs (7+4+1) - now you just multiply each number in the ratio to get how many DVDs there are exactly - does that make sense?

    • one year ago
  7. Shannonlane
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    erm so, you multiply 7 by 36?

    • one year ago
  8. msayer3
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    no, not quite. the actual number of DVDs, compared to the total number in ratio is 3 times larger (36/12). So try multiplying each number in ratio by 3 then you get actual number

    • one year ago
  9. msayer3
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    does that make sense?

    • one year ago
  10. Shannonlane
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    erm so your saying you multiply (which the "/"?) 4 by 3, 7 by 3 and 1 by 3?:LL

    • one year ago
  11. msayer3
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    yeah, that should give you the number of DVDs in each categories -

    • one year ago
  12. msayer3
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    do you understand the process?

    • one year ago
  13. Shannonlane
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    yeah, i think so

    • one year ago
  14. msayer3
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    good to hear - so basically you have to figure out what the ratio is between given sample number and the actual number that you are working with. Then apply that ratio to sample number ratio

    • one year ago
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