Find the Number of Possibilities 2 choose 1

Find the Number of Possibilities 2 choose 1
Evaluate using the formula .
Subtract from .
Simplify .
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Simplify the numerator.
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Expand to .
Multiply by .
Simplify the denominator.
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Raise to the power of .
Raise to the power of .
Use the power rule to combine exponents.
Add and .
Simplify the denominator.
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Expand to .
One to any power is one.
Divide by .
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