यदि \( { }^{n+1} C_{r+1}:{ }^{n} C_{r}:{ }^{n-1} C_{r-1}=11: 6: 3 \), तो \( n \) और \( r \) के म...
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यदि \( { }^{n+1} C_{r+1}:{ }^{n} C_{r}:{ }^{n-1} C_{r-1}=11: 6: 3 \), तो \( n \) और \( r \) के मान ज्ञात कीजिए।
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