If\r\nc=50 ,\\ \nthe\r\nvalue of a+b+c\nwill\r\nbe\nmore\r\nthan 50 but less than 100\nmore\r\nt...

If nP_(r)=720nC_(r), then the value of r, is

Find the value of r if "^nP_r = 3024 and "^nC_r = 126

3^(r) divides 50! then maximum value of r=

If .^nP_r=^nP_(r+1) ,^nC_r=^nC_(r-1) then find value of r

If n and r are integers such that 1

Let f be a real valued function defined on R (the set of all real numbers) such that f(1)=f(-1)=5 and whose graph of f is symmetrical with respect to the lines x=+-1. Given sum_(r=50)^(99)f((r)/(100)) and sum_(r=50)^(150)f((-r)/(100))=5. If S=sum_(r=50)^(150)f((r)/(100))+sum_(r=50)^(150)f((-r)/(100)). Then find S .