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All A are B. One-third of all D are A. Half of all C are B. One C is a A. Eight C are D. There are 90 B. Draw the Venn diagram. How many B are neither A nor C?

 

Correct question is on a post further down.   Melody.

 Dec 2, 2019
edited by Melody  Dec 3, 2019
edited by Melody  Dec 3, 2019
 #1
avatar+105989 
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All A are B.

One-third of all D are A.

Half of all C are B.

One C is a A.

Eight C are D.

There are 90 B.

 

Draw the Venn diagram. How many B are neither A nor C?

 

I am not convinced that there is enough into to sove this.

Here is a Venn diagram outline.  This is how I see the basic problem.  

I will continue to think about it.

 

 

 Dec 3, 2019
edited by Melody  Dec 3, 2019
 #2
avatar+105989 
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Could another capable person take a look at this one please.    laugh

 Dec 3, 2019
 #3
avatar+105989 
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Hi marydien,

Are you sure there is no more information.

 Dec 3, 2019
 #4
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Yes. This is the whole question.

 Dec 3, 2019
 #5
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This is an original question.

All DERFs are ENAJs. One-third of all ENAJs are DERFs. Half of all SIVADs are ENAJs. One SIVAD is a DERF. Eight SIVADs are ENAJs. There are 90 ENAJs. Draw the Venn diagram. How many ENAJs are neither DERFs nor SIVADs?

 Dec 3, 2019
 #6
avatar+105989 
+1

This is a different question.

Look at the first two statements!

 

I spent ages on this.

If you want to change a question like that please put the original one is as well so we can check it has been changed properly.

Melody  Dec 3, 2019
 #7
avatar+105989 
+1

I just spent ages answering properly and now it is all gone.    sad

 

anyway this is not too hard.

Write the question with A,B and C properly.

There are only 3 circles.

A is totally inside B and C overlaps both of them.

See if you can do it now.

 Dec 3, 2019

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