Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
Miyuki
Group Title
Discrete Math Structure > Set Operation.
I asked in a previous question what is the "c" in c(A), and @tamtoan answered that it is for count. I was able to figure out the first question, but can't get the correct answer for the second question.
The second question is:
If c(A Union B) = 17, c(A Intersect B) = 3, and c(A) = c(B), then c(A) = ____?
So, intersection is 3. Union is 17, which means, c(A) and c(B) should have 7 each right? I entered 7, but the result shows it up as incorrect. Did I make a silly mistake somewhere? >_< Thank you.
 2 years ago
 2 years ago
Miyuki Group Title
Discrete Math Structure > Set Operation. I asked in a previous question what is the "c" in c(A), and @tamtoan answered that it is for count. I was able to figure out the first question, but can't get the correct answer for the second question. The second question is: If c(A Union B) = 17, c(A Intersect B) = 3, and c(A) = c(B), then c(A) = ____? So, intersection is 3. Union is 17, which means, c(A) and c(B) should have 7 each right? I entered 7, but the result shows it up as incorrect. Did I make a silly mistake somewhere? >_< Thank you.
 2 years ago
 2 years ago

This Question is Closed

tamtoan Group TitleBest ResponseYou've already chosen the best response.2
it's not 7 each :)...if 7 each in both A and B..you will get at most 14 for the union :)...remember union is 17 and that is less than count of A + count of B ...try drawing some pair of circles ..with intersection 3 first...and distribute other elements so that you can have a union of 17...i think you can figure it out :) if not, can check with me again..i think i got this
 2 years ago

ajprincess Group TitleBest ResponseYou've already chosen the best response.1
dw:1348987956230:dw May be u can this formula
 2 years ago

Miyuki Group TitleBest ResponseYou've already chosen the best response.0
I got the answer after @tamtoan's explanation. Thank you! Thank you @ajprincee's as well, the equation is extremely helpful! :D I wish I could pick two best responses >.< I really appreciate the help!
 2 years ago

ajprincess Group TitleBest ResponseYou've already chosen the best response.1
That's k:) I think @tamtoan deserves the best response than me:)
 2 years ago

tamtoan Group TitleBest ResponseYou've already chosen the best response.2
It's great that you figure it out. Hope that you do well in the future. Thanks for the formular too ajprincess :)
 2 years ago

ajprincess Group TitleBest ResponseYou've already chosen the best response.1
yw:) @tamtoan
 2 years ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.