If \ ^(28)C(2r):\ ^(24)C(2r-4)=225 : 11 ...

If `\ ^(28)C_(2r):\ ^(24)C_(2r-4)`=225 : 11 , find r

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RD SHARMA ENGLISH-COMBINATIONS-All Questions

If \ ^(15)C(3r)=\ ^(15)C(r+3), find \ rdot
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If 15Cr :15C(r-1)=11 :5 find r.
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If \ ^(28)C(2r):\ ^(24)C(2r-4)=225 : 11 , find r
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if C(2n,3):C(n,2)=44:3 find n
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If alpha=\ \ ^4 C2,\ then find the value of \ ^(alpha)C2dot
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