GMAT prep question

andreasonlinegr · Posted: Sun Jul 06, 2008 3:12 am Post subject: GMAT prep question

can you please help solving this?

saeed · Posted: Sun Jul 06, 2008 3:27 am Post subject:

4c2X3c2

andreasonlinegr · Posted: Sun Jul 06, 2008 3:55 am Post subject:

thank you .
i lost you in your answer. what's "c" in ur answer?
can you explain a bit more? thnx

saeed · Posted: Sun Jul 06, 2008 7:53 am Post subject:

here C is for combination.

andreasonlinegr · Posted: Sun Jul 06, 2008 3:54 pm Post subject:

can somebody help with the explanation of this?
thnx in advance

ps
Sorry saeed i still dont understand. whats' 4 combination 2....
provide the full logic and maths..

sibbineni · Posted: Sun Jul 06, 2008 4:00 pm Post subject:

men-->4

women-->3

4 person task is to be formed with 2 men and 2 women.

selecting 2 men from 4 men can be done in 4C3 ways---(1)

selecting 2 women from 3 women can be done in 3C2 ways---(2)

so the no of ways of forming 4 person task is

4C3 * 3C2==>6*3

nCr=n!/(n-r)!*r!

dalwow · Posted: Wed Jul 09, 2008 9:05 am Post subject:

sibbineni means 4c2 (not 4c3 which is in his post) which is 4!/2!*2! which equals 6.