The sum \[\sum\limits_{i=0}^{m}{\left( \begin{matrix} 10 \\ i \\ \end{matrix} \right)}\,\left( \begin{matrix} 20 \\ m-i \\ \end{matrix} \right)\,,\] \[\left( \text{where}\,\left( \begin{matrix} p \\ q \\ \end{matrix} \right)\,=0\,\text{if}\,p

The sum \[\sum\limits_{i=0}^{m}{\left( \begin{matrix} 10 \\ �

1.	The sum \[\sum\limits_{i=0}^{m}{\left( \begin{matrix} 10 \\ i \\ \end{matrix} \right)}\,\left( \begin{matrix} 20 \\ m-i \\ \end{matrix} \right)\,,\] \[\left( \text{where}\,\left( \begin{matrix} p \\ q \\ \end{matrix} \right)\,=0\,\text{if}\,p
A.	5
B.	15
C.	10
D.	20
Answer» C. 10

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The sum \[\sum\limits_{i=0}^{m}{\left( \begin{matrix} 10 \\ i \\ \end{matrix} \right)}\,\left( \begin{matrix} 20 \\ m-i \\ \end{matrix} \right)\,,\] \[\left( \text{where}\,\left( \begin{matrix} p \\ q \\ \end{matrix} \right)\,=0\,\text{if}\,p

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