Probability HELP! (1 Viewer)

[Aachii]

5 boys and 4 girls are at camp. 6 of them are selected to ride in a rowboat. What is the probability that the selected group contains 3 boys and 3 girls?

 

[harrowed2]

There are ⁹C₆ ways of choosing 6 campers from 9 ( = 84)

There are ⁵C₃ ways of selecting 3 boys and ⁴C₃ ways of choosing 3 girls ( ie 10 x 4 )

So the probability of choosing 3 boys and 3 girls is 40/84 = 10/21

 

[Carrotsticks]

Lol why is this in general?

 

[Aysce]

Lol why is this in general?

I wonder about the same thing...

 

[harrowed2]

Lol why is this in general?

Because General does Permutations & Combinations (at a simple level) in their Applications of Probability topic.

 

[Carrotsticks]

Because General does Permutations & Combinations (at a simple level) in their Applications of Probability topic.

I don't remember the General Maths course learning how to utilise C(n,k) notation.

Though I could be mistaken.

 

[iamorbid]

I think...((5x4x3)+(4x3x2)) / 3!