## Shannonlane 3 years ago 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?

1. msayer3

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

2. msayer3

now, all you need is to figure out how that ratio would change for 36 DVDs instead of 12 DVDs

3. Shannonlane

what?:L, sorry but i'm not the clever type so dont see how i'm going to work it out

4. msayer3

alright, what do you get if you divide 36 by 12?

5. Shannonlane

erm 3?:/

6. msayer3

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?

7. Shannonlane

erm so, you multiply 7 by 36?

8. msayer3

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

9. msayer3

does that make sense?

10. Shannonlane

erm so your saying you multiply (which the "/"?) 4 by 3, 7 by 3 and 1 by 3?:LL

11. msayer3

yeah, that should give you the number of DVDs in each categories -

12. msayer3

do you understand the process?

13. Shannonlane

yeah, i think so

14. msayer3

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