MHB Drawing the Venn Diagram for A ∩ Bc

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The discussion focuses on drawing the Venn diagram for the intersection of set A and the complement of set B (A ∩ Bc). Participants confirm that the solution presented is correct, emphasizing that A ∩ Bc can be expressed as A - B. There is clarification that nothing outside of sets A and B should be shaded in the diagram. The conversation highlights the importance of understanding the regions defined by both A and B's complement. Overall, the participants agree on the correct interpretation and representation of the sets involved.
WannaBe
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Draw the venn diagram for A∩Bc

(A Intersection B Completement)

Is my solution correct?

View attachment 1524
 

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Yep, looks good. (Yes)
 
Jameson said:
Yep, looks good. (Yes)
Thank You.

A∩Bc = A-B

So, we don't shade anything in the Universe (rectangle) right? (i.e. outside of A and B)
 
WannaBe said:
Thank You.

A∩Bc = A-B

So, we don't shade anything in the Universe (rectangle) right? (i.e. outside of A and B)

Correct. You're thinking in the right way considering events outside of $A$ and $B$ though. For example, $B^c$ is part of $A$ and everything outside the two circles. However, when we see what is both in $A$ and this region, $B^c$, it is in fact the region you have highlighted in red.
 
There is a nice little variation of the problem. The host says, after you have chosen the door, that you can change your guess, but to sweeten the deal, he says you can choose the two other doors, if you wish. This proposition is a no brainer, however before you are quick enough to accept it, the host opens one of the two doors and it is empty. In this version you really want to change your pick, but at the same time ask yourself is the host impartial and does that change anything. The host...

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