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Of the 120 members of a science committee, 60 are from

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Current Student
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Joined: 11 May 2008
Posts: 555

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Of the 120 members of a science committee, 60 are from [#permalink]

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New post 05 Sep 2008, 03:38
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Of the 120 members of a science committee, 60 are from Europe or Asia, 70 are from Asia or America, and 80 are from Europe or America. If the rest members are from Africa and each member could be from only one continent, how many members are from Africa?
A. 10
B. 15
C. 20
D. 25
E. 30

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Manager
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Re: members from africa [#permalink]

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New post 05 Sep 2008, 08:50
arjtryarjtry wrote:
Of the 120 members of a science committee, 60 are from Europe or Asia, 70 are from Asia or America, and 80 are from Europe or America. If the rest members are from Africa and each member could be from only one continent, how many members are from Africa?
A. 10
B. 15
C. 20
D. 25
E. 30



Good one arjarjarjarj... :-)

Call E=europe A=asia and M=america F=africa
E+A = 60
A + M = 70
M + E = 80

Add all to get 2(A+E+M)=210 so A+E+M = 105

Now A+M+E+F = 120. so F=15

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Current Student
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Joined: 11 May 2008
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Re: members from africa [#permalink]

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New post 05 Sep 2008, 08:57
nice one right???
:bebe

:bouncer :shot
even i was baffled , and could not solve it ...
but after some wonderful soul like you helped me .. i realised my folly.
good work giri.
keep it up.

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SVP
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Re: members from africa [#permalink]

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New post 05 Sep 2008, 10:51
arjtryarjtry wrote:
Of the 120 members of a science committee, 60 are from Europe or Asia, 70 are from Asia or America, and 80 are from Europe or America. If the rest members are from Africa and each member could be from only one continent, how many members are from Africa?
A. 10
B. 15
C. 20
D. 25
E. 30


2(E+As+Am)=210
Af = 120 - (E+As+Am)=120-105=15
_________________

Your attitude determines your altitude
Smiling wins more friends than frowning

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Director
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Re: members from africa [#permalink]

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New post 05 Sep 2008, 11:02
arjtryarjtry - good question +1

I was ratting my head over this.
Same approach as bhushangiri & suresh.

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Re: members from africa   [#permalink] 05 Sep 2008, 11:02
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Of the 120 members of a science committee, 60 are from

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