Q30Multiple choice
– 3r = 15, i.e., r = 5 Therefore, C5 (2) is the coefficient of x15 (from (1)) 15 5 To find the term independent of x, put 30 – 3r = 0 Thus 15C10 210 is the term independent of x (from (1)) C5 25 1 1 Now the ratio is 15 10 = 5= C10 2 2 32 5 5