• Interested in being a marker for this year's BoS Maths Trials?
    Let us know before 31 August, see this thread for details

really easy probability (1 Viewer)

Watsername

Member
Joined
Jul 12, 2005
Messages
31
Gender
Female
HSC
2005
I have no idea why I cant get the books answer and now I'm really worried

The questions asks: How many committees of one boy and one girl can be selected from 5 boys and 6 girls

wouldnt it just be 5x6?
The answer is 150? so are you meant to times by 5 twice?

sorry I know this was a really stupid question
 

Dreamerish*~

Love Addict - Nakashima
Joined
Jan 16, 2005
Messages
3,704
Gender
Female
HSC
2005
Watsername said:
I have no idea why I cant get the books answer and now I'm really worried

The questions asks: How many committees of one boy and one girl can be selected from 5 boys and 6 girls

wouldnt it just be 5x6?
The answer is 150? so are you meant to times by 5 twice?

sorry I know this was a really stupid question
5C1 x 6C1 = 30

I don't know, it seems right. Maybe the textbook made a mistake?
 

haboozin

Do you uhh.. Yahoo?
Joined
Aug 3, 2004
Messages
707
Gender
Male
HSC
2005
Watsername said:
I have no idea why I cant get the books answer and now I'm really worried

The questions asks: How many committees of one boy and one girl can be selected from 5 boys and 6 girls

wouldnt it just be 5x6?
The answer is 150? so are you meant to times by 5 twice?

sorry I know this was a really stupid question


yea its 30...
but... committee is a 3unit section.
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top