Question Number 65866 by Sayantan chakraborty last updated on 05/Aug/19
![](https://www.tinkutara.com/question/8906.png)
Commented by Sayantan chakraborty last updated on 05/Aug/19
![please help.Urgent need.](https://www.tinkutara.com/question/Q65867.png)
$${please}\:{help}.{Urgent}\:{need}. \\ $$
Commented by Sayantan chakraborty last updated on 05/Aug/19
![please solve](https://www.tinkutara.com/question/Q65880.png)
$$\mathrm{please}\:\mathrm{solve} \\ $$
Commented by Prithwish sen last updated on 05/Aug/19
![Put Σ_(k=0) ^p (^n C_k )(^m C_(p−k) )=^(n+m) C_p](https://www.tinkutara.com/question/Q65894.png)
$$\mathrm{Put}\:\underset{\mathrm{k}=\mathrm{0}} {\overset{\mathrm{p}} {\sum}}\left(^{\mathrm{n}} \mathrm{C}_{\mathrm{k}} \right)\left(^{\mathrm{m}} \mathrm{C}_{\mathrm{p}−\mathrm{k}} \right)=^{\mathrm{n}+\mathrm{m}} \mathrm{C}_{\mathrm{p}} \\ $$
Commented by Sayantan chakraborty last updated on 05/Aug/19
![what is the proof of above result?](https://www.tinkutara.com/question/Q65908.png)
$$\mathrm{what}\:\mathrm{is}\:\mathrm{the}\:\mathrm{proof}\:\mathrm{of}\:\mathrm{above}\:\mathrm{result}? \\ $$
Commented by Sayantan chakraborty last updated on 05/Aug/19
![answer is not matching.](https://www.tinkutara.com/question/Q65909.png)
$$\mathrm{answer}\:\mathrm{is}\:\mathrm{not}\:\mathrm{matching}. \\ $$