The number of positive integral solutions of `x+y+z=n,n in N, n >= 3` is

The number of non-negative integral solutions of x+y+z<=n, where n in N is

The number of non-negative integral solutions of x+y+z<=n, where n in N is

The number of non negative integral solution of x+y+z<=n, where n in N

If N is the number of positive integral solutions of x_1x_2x_3x_4 = 770 , then N =

If n is the number of positive integral solutions of x_1 x_2 x_3 x_4 = 210 . Then

If the number of positive integral solutions of u+v+w=n be denoted by P_(n) then the absolute value of |{:(P_(n),P_(n+1),P_(n+2)),(P_(n+1),P_(n+2),P_(n+3)),(P_(n+2),P_(n+3),P_(n+4)):}| is

If the number of positive integral solutions of u+v+w=n be denoted by P_(n) then the absolute value of |{:(P_(n),P_(n+1),P_(n+2)),(P_(n+1),P_(n+2),P_(n+3)),(P_(n+2),P_(n+3),P_(n+4)):}| is

If the number of positive integral solutions of u+v+w=n be denoted by P_(n) then the absolute value of |{:(P_(n),P_(n+1),P_(n+2)),(P_(n+1),P_(n+2),P_(n+3)),(P_(n+2),P_(n+3),P_(n+4)):}| is

Assertion (A) : The number of positive integral solutions of x_(1)+x_(2)+x_(3)=10 is 36. Reason (R) : The number positive integral solutions of the equation x_(1)+x_(2)+x_(3)+.......+x_(k)=n is ""^(n-1)C_(k-1) , The correct answer is