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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.
 one year ago
 one year ago
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.
 one year ago
 one year ago

This Question is Closed

tamtoanBest 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
 one year ago

ajprincessBest ResponseYou've already chosen the best response.1
dw:1348987956230:dw May be u can this formula
 one year ago

MiyukiBest 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!
 one year ago

ajprincessBest ResponseYou've already chosen the best response.1
That's k:) I think @tamtoan deserves the best response than me:)
 one year ago

tamtoanBest 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 :)
 one year ago
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