Find the ratio of `^20 C_ra n d^(25)C_r` when each of them has the greatest possible value.

If r is the remainder when each of 4749, 5601 and 7092 is divided by the greatest possible number d(gt1) , then the value of (d + r) will be:

In .^(6)C_(n) what are the possible values of r?

Find the value of nwhen 20C_(3n)=20C(2n+5)

If sum_(k=0)^(9)(-1)^(k)3^(9-k)quad^20C_(k)^(20-k)C_(9-k)2^(-9)=^(20)C_(r) ,then value of (r)/(20) ,where r takes greatest possible value

If n (A Delta B) = 12 and n(A nn B) = 3 , then find the greatest possible value of n(A xx B) .

If C(12,r)= 495 then find the possible values of r

Square of the distance between the integral points of intersection of L_1a n dL_2 for the greatest and the least integral values of m is 5 b. 20 c. 25 d. 30""