একটি নির্বাচনে, সফল প্রার্থী \r\n5,77,570 ভোট এবং তার নিকটতম প্রতিদ্বন্দ্বী\r\n...

If n = 9 and r = 5, then (n-r)! = ………….

If f(n)=prod_(r=1)^(n)cos r,n in N , then

Evaluate (n!)/((n-r)!) , when (i) n = 6, r = 2 (ii) n = 9, r = 5

Evaluate (n - r) !, when : (i) n=6, r=2 (ii) n=9, r=5

Evaluate : (n!)/((n-r)!) where n=5,r=2

If (n+r)(n+r-1)=110and(n-r)(n-r-1)=20 solve for n and r

If Delta_r=|[2^(r-1)2 , 3^(r-1) , 4. 5^(r-1)] , [x , y , z] , [2^n-1 , 3^n-1 , 5^n-1]|dot Show that sum_(r=1)^n Delta_r=Con s t a n t

Given that C(n, r) : C(n,r + 1) = 1 : 2 and C(n,r + 1) : C(n,r + 2) = 2 : 3 . What is P(n, r) : C(n, r) equal to ?

When n = 5 and r = 2, find the values of : (i) (n!)/(r!) (ii) (n!)/(r!(n-r)!)