मान निकालें `.^(20)C_(5)+sum_(j=2)^(5).^(25-j)C_(4)`

Evaluate : .^(20)C_(5)+sum_(j=2)^(5).^(25-j)C_(4)

Evaluate .^(20)C_(5)+sum_(r=2)^(5).^(25-r)C_(4)

14C_(4)+sum_(j=1)^(4)(18-j)C_(3)

What is ""^(47)C_(4)+""^(51)C_(3)+ sum_(j=2)^(5) ""^(52-j)C_(3) equal to ?

The value of the expression ""^(47)C_(4) + sum_(j =1)^(5)""^(52-j)C_(3) is equal to :

Evaluate ^(47)C_(4)+sum_(j=0)^(3)""^(50-j)C_(3)+sum_(k=0)^(5) ""^(56-k)C_(53-k) .

Evaluate ^(47)C_(4)+sum_(j=0)^(3)""^(50-j)C_(3)+sum_(k=0)^(5) ""^(56-k)C_(53-k) .

So, statement-1 is also true. Stetement-2 is a correct expanation for statement-1. S_(1)= sum_(j=1)^(10) j (j -1)""^(10)C_(j),S_(2)= sum_(j=1)^(10)j.""^(10)C_(j) and S_(2)= sum_(j=1)^(10)j.""^(10)C_(j) . Statement-1 S_(3) = 50xx2^(9) . Statement-2 S_(1) = 90xx2^(8) and S_(2) = 10 xx 2^(8)