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andrew1140

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Joined
Jul 8, 2009
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hello to the people here in freemathhelp, i would like to ask you guys about this problem..

Student organizations A, B and C have 50 students,
>7 belong to B only
>20 belong to C only
>23 belong to A only
>5 belong to A and B but not to C
>8 belong to A and C but not to B
*>14 belong to C but not to B
*>15 belong to A but not to B

how many students..
belong to C only?
don't belong to C ?
belong to B and C but not to A?
belong to only 1 organization?
dont belong to any organization?

you know what guys, i could actually solve a problem in venn diagrams but the statements "14 belong to C but not to B" and "15 belong to A but not to B" confuses me a lot. If you guys could help me i'll really appreciate it. Thanks in advance :)
 
andrew1140 said:
hello to the people here in freemathhelp, i would like to ask you guys about this problem..

Student organizations A, B and C have 50 students,
>7 belong to B only
>20 belong to C only
>23 belong to A only
>5 belong to A and B but not to C
>8 belong to A and C but not to B
*>14 belong to C but not to B
*>15 belong to A but not to B

how many students..
belong to C only?
don't belong to C ?
belong to B and C but not to A?
belong to only 1 organization?
dont belong to any organization?

you know what guys, i could actually solve a problem in venn diagrams but the statements "14 belong to C but not to B" and "15 belong to A but not to B" confuses me a lot. If you guys could help me i'll really appreciate it. Thanks in advance :)
Click to expand...

Do you have the correct problem statement?

If there are total 50 students (Student organizations A, B and C have 50 students) then the first three statements imply that thre are no combined membership.

That contradicts rest of the "givens" in the problem.

At least that's the way I interpret it.....
 
yeah thanks i got your point at "15 belong to A but not to B" but how about the statement "14 belong to C but not to B"?
why didn't it specify if that 14 does not or do belong to A ?
 
andrew1140 said:
yeah thanks i got your point at "15 belong to A but not to B" but how about the statement "14 belong to C but not to B"?
why didn't it specify if that 14 does not or do belong to A ?
Click to expand...

I edited my answer - there is something wrong with the problem statement.
 
andrew1140 said:
hello to the people here in freemathhelp, i would like to ask you guys about this problem..

Student organizations A, B and C have 50 students,
>7 belong to B only
>20 belong to C only
>23 belong to A only
>5 belong to A and B but not to C
>8 belong to A and C but not to B
*>14 belong to C but not to B
*>15 belong to A but not to B

how many students..
belong to C only?---> 20 belongs to C only ....
don't belong to C ?
belong to B and C but not to A?
belong to only 1 organization?
dont belong to any organization?

you know what guys, i could actually solve a problem in venn diagrams but the statements "14 belong to C but not to B" and "15 belong to A but not to B" confuses me a lot. If you guys could help me i'll really appreciate it. Thanks in advance :)
Click to expand...
 
andrew1140 said:
...how about the statement "14 belong to C but not to B"?
why didn't it specify if that 14 does not or do belong to A ?
Click to expand...

I would guess this means "The number of students who belong to C and A, but not B, PLUS the number that belong to C only, and not B nor A, equals 14"
 
Student organizations A, B and C have 50 students,
>7 belong to B only
>20 belong to C only
>23 belong to A only
>5 belong to A and B but not to C

Does anybody find the statements to be inconsistent?
 
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