Word Problem

[Aman verma]

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

[ajith]

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)

[Aman verma]

Ans.[spoiler]c)200[/spoiler].

[GMATSUCKER]

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.

[Aman verma]

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 ?

[GMATSUCKER]

.

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

No. He is my employee !

[Aman verma]

No. He is my employee !

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