jee-main 2021 Q63

jee-main · India · session2_17mar_shift2 Binomial Theorem (positive integer n) Evaluate a Summation Involving Binomial Coefficients
The value of $\sum _ { r = 0 } ^ { 6 } \left( { } ^ { 6 } C _ { r } \cdot { } ^ { 6 } C _ { 6 - r } \right)$ is equal to:
(1) 1124
(2) 1324
(3) 1024
(4) 924 
The value of $\sum _ { r = 0 } ^ { 6 } \left( { } ^ { 6 } C _ { r } \cdot { } ^ { 6 } C _ { 6 - r } \right)$ is equal to:\\
(1) 1124\\
(2) 1324\\
(3) 1024\\
(4) 924
Paper Questions
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