jee-main 2021 Q76

jee-main · India · session3_20jul_shift1 Combinations & Selection Combinatorial Identity or Bijection Proof
If $\sum _ { k = 1 } ^ { 10 } K ^ { 2 } \left( { } ^ { 10 } C _ { K } \right) ^ { 2 } = 22000 L$, then $L$ is equal to 
If $\sum _ { k = 1 } ^ { 10 } K ^ { 2 } \left( { } ^ { 10 } C _ { K } \right) ^ { 2 } = 22000 L$, then $L$ is equal to
Paper Questions
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