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Shannonlane Group Title

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?

  • 2 years ago
  • 2 years ago

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

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

    • 2 years ago
  3. Shannonlane Group Title
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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

    • 2 years ago
  4. msayer3 Group Title
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    alright, what do you get if you divide 36 by 12?

    • 2 years ago
  5. Shannonlane Group Title
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    erm 3?:/

    • 2 years ago
  6. msayer3 Group Title
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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?

    • 2 years ago
  7. Shannonlane Group Title
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    erm so, you multiply 7 by 36?

    • 2 years ago
  8. msayer3 Group Title
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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

    • 2 years ago
  9. msayer3 Group Title
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    does that make sense?

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

    • 2 years ago
  11. msayer3 Group Title
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    yeah, that should give you the number of DVDs in each categories -

    • 2 years ago
  12. msayer3 Group Title
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    do you understand the process?

    • 2 years ago
  13. Shannonlane Group Title
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    yeah, i think so

    • 2 years ago
  14. msayer3 Group Title
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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

    • 2 years ago
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