If 25∑r=0{ 50Cr⋅ 50−rC25−r}=K( 50C25) then K is equal to :

1.	If 25∑r=0{ 50Cr⋅ 50−rC25−r}=K( 50C25) then K is equal to :
Answer» If $25 \sum r = 0 {^{50} C_{r} \cdot^{50 - r} C_{25 - r}} = K (^{50} C_{25})$ then $K$ is equal to :

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