Dogs in the GoodDog Obedience School win a blue ribbon for learning how to sit, a green ribbon for learning how to roll over, and a white ribbon for learning how to stay. There are $100$ dogs in the school. $\bullet$ $62$ have blue ribbons, $55$ have green ribbons, and $63$ have white ribbons. $\bullet$ $32$ have a blue ribbon and a green ribbon; $31$ have a green ribbon and a white ribbon; $38$ have a blue ribbon and a white ribbon. $\bullet$ $16$ have all three ribbons. How many dogs have not learned any tricks?

Guest Jun 10, 2020

#1**+1 **

You use a venn diagram.

Venn diagrams will be very useful for your course, at leastt in the first 2 weeks.

hugomimihu Jun 11, 2020

#3**0 **

It’s helpful because Hugo can post useless bullshit and add a few points to his score that he doesn’t care about… It’s easier than answering the question.

Hugo, if you post an answer to this question by Saturday, I’ll add 20 points to your score. If not I’ll deduct 20.

It must be your own work; no plagiarism or copying.

Guest Jun 11, 2020

#4**+1 **

It's useful because that's the only way you solve the question.

The chapter this is in is literally called "Venn Diagrams".

I'm giving a hint.

That's the only hint that doesn't really disclose anything really close ti the answer.

hugomimihu
Jun 11, 2020

#5**+1 **

Fine.

Here's something to help you get started.

3 ribbons so 3 circle- venn diagram.

total is 100.

First put 32 in the intersection between blue and green, 31 in the intersection between green and white, 38 inthe intersection blue and white.

Put 16 in the center.

THere are 100-16 dogs that have not earned all three.

And you can subtract the intersect from the singles to get the single amounts.

hugomimihu Jun 11, 2020

#6**+1 **

This isn’t the correct answer, Hugo.

The question is: How many dogs have not learned **any** tricks?

Answer this correctly and post a Venn diagram and you’ll have your points. If it’s a good quality diagram, I’ll add 10 extra points.

Guest Jun 11, 2020

#7**+1 **

I know.After doing what I did, you can then calculate total by adding up all 7 parts of venn diagram subtract from 100.

hugomimihu
Jun 11, 2020

#8**+2 **

We start with 62+55+63-32-31-38+16=95 so 95 dogs learned a trick and we do 100-95=5 so __5__ dogs did not learn any tricks

jimkey17 Jun 11, 2020

#12**0 **

Hugo, are you going to post a Venn diagram? You used your typical ** lick and prayer** answer method, which is just lazy slop. Jimkey posted a correct math solution, so no point in you doing that too. If you post a

OH … *if you don't understand anything feel free to ask! *Make sure you ask soon enough. There are no extensions…

Guest Jun 13, 2020

#13**+1 **

Here is a diagram that I hope will suit your needs.

I hope we have no more conflicts after this.

Also is EDT GMT-4, Eastern standard?

hugomimihu Jun 13, 2020

#14**+2 **

Here is another AoPS question in which you can peer edit my response

https://web2.0calc.com/questions/at-my-office-people-own-cats-people-own-dogs-and

I can assure you that this is the right answer.

hugomimihu
Jun 13, 2020

#15**0 **

Hugo,

The data on this Venn diagram are incorrect. The diagram is also missing the total number of dogs and the number of dogs that didn’t win any ribbons.

**This is sloppy work! You still have time to fix the mistakes.**

-----

*Also is EDT GMT-4, Eastern standard?*

GMT -4 [AST] is Atlantic Standard Time. The designator is optional for Standard Time

GMT -4 EDT is Eastern Daylight Time

GMT -5 [EST] is Eastern Standard Time

GMT -5 CDT is Central Daylight Time

Guest Jun 13, 2020

#16**+2 **

The data is indeed correct.

Unless if AoPS is incorrect?

I rendered the image myself, but the numbers come straight from both mine and AoPS' calculations.

If you'll be so kind as to point out the errors?

Total and no-tricks added

hugomimihu
Jun 13, 2020

#17**0 **

I’m sure the AoPS answer is correct. However, this is **not** the answer for the posted question. If you are going to plagiarize, you should at least make sure you are copying the correct answer.

You still have about 4 hours to post the correct one. You’ll still get 20 points, although I may deduct 50 points for plagiarizing. You need to clearly indicate the source when you post solutions or diagrams that are not your original work.

I’ll post a (non-plagiarized) Venn diagram (including all the supplementary data), after the time expires.

Tick-Tock ……….

Guest Jun 14, 2020

#18**+2 **

How am I plagarizing?

I drew the diagram myself using asymptote.

The answer is, 6 dogs who have not learned any tricks.

This IS the answer fo the given question.

This is indeed.

I have personally checked.

Here is the proof:

62 have blue: 7+23+16+16 = 30 + 32 = 62

55 have green, 16+16+15 + 8 = 32 + 23 = 55

63 white: 23+15+16 + 9 = 38 + 25 = 63

Any further prrof needed?

hugomimihu
Jun 14, 2020

#19**+2 **

Guest is right Hugo.

Your answer is not correct

How about this statement

$38$ have a blue ribbon and a white ribbon

Melody
Jun 14, 2020

#20**0 **

*How am I plagarizing?*

The how is you are extracting the data from a solution provided by another (AoPS). You may be rendering the data via Asymptote, but this is not your original work –it belongs to someone else. You may have verified the solution by doing the work, but your verification is a derivative of that AoPS solution. When your work is based on any other work, you need to acknowledge and cite that reference. This is true, even if it is your own work that you have presented previously.

Now back to your presented solution:

I can see that your math matches your Venn diagram, but it does not match the data in the question.

Below are two Venn diagrams showing **all the data relations**. The first one is based on your data from (AoPS); the second is based on my data from the posted question.

As you may see there are some subtle differences: the diagrams clearly show a difference in the number of dogs that won both a blue and white ribbon: Your graph shows 39 and mine shows 38. Note in the posted question that, *$38$ *(sic) *have a blue ribbon and a white ribbon.* (Also noted by Melody.)

Along with other changes, this difference reduced the number of orphans by one (1). So, either AoPS made a mistake or the questions are different.

**This is why it’s important to actually solve the posted questions independently and then verify the answer via another source, rather than finding a source then basing your answer on that data.** If your answer does not agree with the source, you investigate why.

.

Guest Jun 14, 2020

edited by
Guest
Jun 14, 2020

#21**+1 **

I apologize, I read the 38 as 39.

As I am pretty used to AoPS questions I naturally assumed this was the same.

hugomimihu
Jun 14, 2020

#22**+1 **

You assume that all the time Hugo.

It is this constant assumption that annoys other people so much.

You did not answer the question. If you were looking at the AOPS question then you did not even TRY to answer this question by yourself.

The AOPS question or the answer should not have been anywhere near you!

For a question like this you can check your answer from the original question given. You did not need to look anywhere else for confirmation, even when you were challenged, you did not check your answer thoroughly.

Melody
Jun 15, 2020

#23**+2 **

I actually was not looking at the AoPS question.

All AoPS questions are stored on my desktop computer only, and I usually go on my laptop.

I assumed since I've seen this exact question many times in the last month.

I do apologize for my error.

hugomimihu
Jun 15, 2020