- #1

mutineer123

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**combination problem: A football team consists of 3 players who play in a defence...**

## Homework Statement

http://www.xtremepapers.com/CIE/International%20A%20And%20AS%20Level/9709%20-%20Mathematics/9709_s05_qp_6.pdf

7 a ii (if exactly one forward player must be included, together with any two others)

## Homework Equations

## The Attempt at a Solution

I don't understand why my answer is wrong. So before answering to what the actual answer is, FIRST I want you to explain it to me why my answer is

*not*right.

Heres what I did:

The possible combinations are

(D,M,F)

(D,D,F)

(M,M,F)

I got

3C1 X 3C1 X 5C1 +

3C1 X 2C1 X 5C1 +

3C1 x 2C1 x 5C1

=105