JC Maths (H.L) Sets Question

Elsa714

Would someone explain this question to me please.

A number of people were asked which of the 3 papers - The Journal (J), The News (N) and The Tribune (T) - they had bought the previous week.

Some of the results are shown in the Venn diagram given that
(1) 20 people bought The News
(2) 23 people bought The Journal
(3) 10 people bought The Journal and The Tribune
(4) 8 people bought The Tribune only.

Given that there 40 people in the survey who bought The Tribune or The Journal or both, fine the value of x.

J ∩ N = 2
J ∩ N ∩ T = 4
N ∩ T = x

skippy1977

Looks like there is something wrong with the question.

J ∩ N = 2
J ∩ N ∩ T = 4

There can't be 4 that bought all three but only 2 that bought Journal and the News. Are you sure it is written like that?

Elsa714

Yes I'm pretty sure. I looked at the answers and x = 9, but I don't understand how you get 9.

skippy1977

Have you a picture of it?

Elsa714

Yes here it is:

file:///C:/Users/Joseph/Pictures/Saved%20Pictures/thing%20%232.jpg

The Venn diagram:

file:///C:/Users/Joseph/Pictures/Saved%20Pictures/thing.jpg

sryanbruen

Em we can't see the pictures with those "user" links.

Use a site like Imgur and then use the add image function of Boards.ie.

Aibhif

Sent u a PM last wk Elsa714 regarding answer....did u get it? Have photo of answer in Imgur but not sure how to give ye access to it via boards.ie????

sryanbruen

Aibhif wrote: »

Sent u a PM last wk Elsa714 regarding answer....did u get it? Have photo of answer in Imgur but not sure how to give ye access to it via boards.ie????

Just copy the link and embed it using the add image feature or just post the URL. Plain and simple.

Aibhif

Maybe for you! Tried posting URL and got message that I am not allowed to do so as I am a new user.... Where is add image?

sryanbruen

Aibhif wrote: »

Maybe for you! Tried posting URL and got message that I am not allowed to do so as I am a new user.... Where is add image?

Ah yeah, forgot that you're a new user. You need to have done at least 50 posts to be able to post URLs.

You press this that you see in the picture below (though I'm guessing now that you're using a phone?). Or you can just add at the end of the link.

So you will need to do 50 posts before doing this I think also.

sryanbruen

As Aibhif cannot post images/links, here it is for you Elsa714:

Elsa714

Thanks so much sryanbruen. It was clearly understandable and I hope you will be able to help me in the future.