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by sanyalpritish » Thu Apr 22, 2010 7:54 pm
Among the first ten cyclists who crossed the finish-line, 4 were Italians and 8 represented Telefonica team. How many cyclists who represented Telefonica team and finished in the top ten were not Italians?

1. 2 Italians who finished in the top ten did not represent Telefonica team
2. Each of the top ten finishers either was an Italian or represented Telefonica team or both

OA-D
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Source: — Data Sufficiency |
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by thephoenix » Thu Apr 22, 2010 8:11 pm
use matix method u will get the ans
luk attachment for solution
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by eaakbari » Thu Apr 22, 2010 8:12 pm
IMO D

Stem
I-4
T-8
I ^ T = ?
Note: Here ^ represents intersection (Thanks sanju!).
What we need to find is
T- (I ^ T)
or 8 - (I^T)

(1)
Since it mentions 2 out of 4 cyclists were only italian
Hence the number which was in Telefonica Team = 4-2=2, Hence (I^T)= 2
So pure telefonica = 8-2=6
Suff

(2)
From this statement we can understand that our entire sample space of top ten is Telefonica or Italian.
Hence
(I U T) = I + T - (I ^ T)
10=4+8-( I ^ T)
(I ^ T)=2
Hence only telefonica = 8-2=6
Suff

Hence D
Last edited by eaakbari on Thu Apr 22, 2010 10:16 pm, edited 2 times in total.
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by sanju09 » Thu Apr 22, 2010 9:53 pm
eaakbari wrote:IMO D

Stem
I-4
T-8
I ^ T = ?


(1)
Since it mentions 2 out of 4 cyclists were only italian
Hence the number which was in Telefonica Team = 4-2=2
So pure telefonica = 8-2=6
Suff

(2)
From this statement we can understand that our entire sample space of top ten is Telefonica or Italian.
Hence
(I U T) = I + T - (I ^ T)
10=4+8-( I ^ T)
(I ^ T)=2
Hence only telefonica = 8-2=6
Suff

Hence D
excellent

but what's I ^ T?
The mind is everything. What you think you become. -Lord Buddha



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by eaakbari » Thu Apr 22, 2010 9:57 pm
sanju09 wrote:
eaakbari wrote:IMO D

Stem
I-4
T-8
I ^ T = ?


(1)
Since it mentions 2 out of 4 cyclists were only italian
Hence the number which was in Telefonica Team = 4-2=2
So pure telefonica = 8-2=6
Suff

(2)
From this statement we can understand that our entire sample space of top ten is Telefonica or Italian.
Hence
(I U T) = I + T - (I ^ T)
10=4+8-( I ^ T)
(I ^ T)=2
Hence only telefonica = 8-2=6
Suff

Hence D
excellent

but what's I ^ T?
Well Sanju, thats the closest symbol to an intersection that I could find on my keyboard :?
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by sanju09 » Thu Apr 22, 2010 10:04 pm
eaakbari wrote:
Well Sanju, thats the closest symbol to an intersection that I could find on my keyboard :?
But, are they asking for intersection of I and T? I think they are asking to obtain T - I, in set language, Isn't it?
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by eaakbari » Thu Apr 22, 2010 10:14 pm
sanju09 wrote:
eaakbari wrote:
Well Sanju, thats the closest symbol to an intersection that I could find on my keyboard :?
But, are they asking for intersection of I and T? I think they are asking to obtain T - I, in set language, Isn't it?
Yes, they are. What I meant was if he can find the intersection , we can find T-(I^T). Seems I have made it a little unclear. Thanks sanju , Ill edit it
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