# Find the Number of Possibilities seven choose four

Evaluate using the formula .

Subtract from .

Should be rewritten as .

The common factor should be canceled of .

Cancel the common factor.

Reformulate the expression.

Clarify the numerator.

First, multiply by .

Multiply by .

Clarify the denominator.

Expand to .

Simplify.

Multiply by .

Multiply by .

First, divide by .

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