# Finite Math Examples

Find the number of possible unordered combinations when items are selected from available items.

Fill in the known values.

Subtract from to get .

Rewrite as .

Reduce the expression by cancelling the common factors.

Reduce the expression by cancelling the common factors.

Cancel the common factor.

Rewrite the expression.

Multiply by to get .

Simplify the denominator.

Expand to .

Multiply by to get .

Divide by to get .