Answer
1
Work Step by Step
We know that:
$_nC_r =\frac{_nP_r}{r!} = \frac{n!}{(n-r)!r!}$
$_3C_0 = \frac{3!}{(3-0)!0!}$
$\frac{ 3!}{3!}$
Which we know is equal to $\underline 1$.
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