If  `C_(0), C_(1), C_(2), …,   C_(n)` denote the binomial   coefficients in the expansion  of `(1+x)
Channel: Doubtnut
Date: 2020-05-31

If  `C_(0), C_(1), C_(2), …,   C_(n)` denote the binomial   coefficients in the expansion  of `(1 + x)^(n) ` , then `sum_(r=0)^(n)sum_(s=0)^(n)C_(r)C_(s)`=