Asked by keshav

For how many ordered pairs of positive integers n and k with n and k less than or equal to 20, is the number
((2n)!(2k)!) / (n!k!(n+k)!) an integer?
Answered by keshav
yr pls someone solve it.....
Answered by Shame
No-one will solve it for you you cheat!!! Copying questions from Brilliant huh? Lame, lame!!!
Answered by keshav
so whats ur problem i mean usmey aapko problem kya hai..?
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