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arjtryarjtry
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Of the 120 members of a science committee, 60 are from 05 Sep 2008, 03:38
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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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bhushangiri
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Of the 120 members of a science committee, 60 are from 05 Sep 2008, 08:50
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arjtryarjtry
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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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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arjtryarjtry
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Of the 120 members of a science committee, 60 are from 05 Sep 2008, 08:57
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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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x2suresh
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Of the 120 members of a science committee, 60 are from 05 Sep 2008, 10:51
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arjtryarjtry
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
Show more

2(E+As+Am)=210
Af = 120 - (E+As+Am)=120-105=15
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Of the 120 members of a science committee, 60 are from 05 Sep 2008, 11:02
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arjtryarjtry - good question +1

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



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