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by Aman verma » Fri Feb 26, 2010 3:24 am
Q: In a poker competion involving some boys and girls of a Business School Poker Club ,every student had to play exactly one game with every other student. It was found that in 45 games both the players were girls and in 190 games both were boys . The number of games in which one player was a boy and the other was a girl is :

a)164

b)180

c)200

d)216

e)256
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by ajith » Fri Feb 26, 2010 3:31 am
Aman verma wrote:Q: In a poker competion involving some boys and girls of a Business School Poker Club ,every student had to play exactly one game with every other student. It was found that in 45 games both the players were girls and in 190 games both were boys . The number of games in which one player was a boy and the other was a girl is :

a)164

b)180

c)200

d)216

e)256
Let 'b' be the number of boys and 'g' be the number of girls

bC2 =45
b(b-1)/2 =45

b(b-1) = 10*9
b=10

gC2 = 190
g(g-1) = 380
g(g-1) =20*19
g =20

The total no of games = 30C2 = 30*29/2 = 435

The number of games in which one player was a boy and the other was a girl = 435-190-45 =200 (it is the same as 20C1*10C1)
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by Aman verma » Sat Feb 27, 2010 3:04 am
Ans.[spoiler]c)200[/spoiler].
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by GMATSUCKER » Sat Feb 27, 2010 3:11 am
Aman verma wrote:Ans.[spoiler]c)200[/spoiler].
B= boys G=girls. BC2=190 => B=20 , GC2=45 => G=10, total players 20 + 10 = 30

Matches between single boy and single girl = 20C1*10C1 = 200

This is not a real GMAT question.Stuart Kovinsky has already pointed that your posts are not real GMAT questions.
Post only real GMAT type questions.
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by Aman verma » Sat Feb 27, 2010 3:18 am
GMATSUCKER wrote:
Aman verma wrote:Ans.[spoiler]c)200[/spoiler].


This is not a real GMAT question.Stuart Kovinsky has already pointed that your posts are not real GMAT questions.
Post only real GMAT type questions.
Hey GMATSUCKER , are you an employee of Stuart Kovinsky or something ?
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by GMATSUCKER » Sat Feb 27, 2010 3:21 am
Aman verma wrote:
GMATSUCKER wrote:.

Hey GMATSUCKER , are you an employee of Stuart Kovinsky or something ?

No. He is my employee !
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by Aman verma » Sat Feb 27, 2010 3:24 am
GMATSUCKER wrote:

No. He is my employee !

What .........................!!!!!!!!????????????????????????
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